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1.  Diagnosis-specific disability pension predicts suicidal behaviour and mortality in young adults: a nationwide prospective cohort study 
BMJ Open  2013;3(2):e002286.
Objectives
Increasing rates of disability pension (DP), particularly owing to mental diagnoses, have been observed among young adults in Organisation for Economic Co-operation and Development (OECD) countries. There is a lack of knowledge about the health prognosis in this group. The aim of this study was to investigate whether DP in young adulthood owing to specific mental diagnoses or somatic diagnoses predicts suicidal behaviour and all-cause mortality.
Design
A nationwide prospective cohort study.
Setting
A register study of all young adults who in 2005 were 19–23 years old and lived in Sweden. Registers held by the National Board of Health and Welfare, Statistics Sweden and the National Social Insurance Agency were used.
Participants
525 276 young adults. Those who in 2005 had DP with mental diagnoses (n=8070) or somatic diagnoses (n=3975) were compared to all the other young adults in the same age group (n=513 231).
Outcome measures
HRs for suicide attempt, suicide and all-cause mortality in 2006–2010 were calculated by Cox proportionate hazard regression models, adjusted for sex, country of birth, parental education and parental and previous own suicidal behaviour.
Results
The adjusted HR for suicide attempt was 3.32 (95% CI 2.98 to 3.69) among those on DP with mental diagnoses and 1.78 (95% CI 1.41 to 2.26) among those on DP with somatic diagnoses. For the specific mental diagnoses, the unadjusted HRs ranged between 2.42 (mental retardation) and 22.94 (personality disorders), while the adjusted HRs ranged between 2.03 (mental retardation) and 6.00 (bipolar disorder). There was an increased risk of mortality for young adults on DP in general, but only those with mental DP diagnoses had a significantly elevated HR of completed suicide with an adjusted HR of 3.92 (95% CI 2.83 to 5.43).
Conclusions
Young adults on DP are at increased risk of suicidal behaviour and preterm death, which emphasises the need for improved treatment and follow-up.
doi:10.1136/bmjopen-2012-002286
PMCID: PMC3586126  PMID: 23396561
Disability; Suicide; Psychiatry; Registers
2.  Psychiatrists′ work with sickness certification: frequency, experiences and severity of the certification tasks in a national survey in Sweden 
Background
Many psychiatrists are involved in sickness certification of their patients; however, there is very limited knowledge about this aspect of their work. The objective of this study was to explore frequencies of problematic issues in the sickness certification tasks and experiences of severity regarding these problematic issues among psychiatrists.
Methods
A cross-sectional nationwide questionnaire study to all physicians in Sweden. The 579 specialists in psychiatry who answered the questionnaire, were under 65 years of age, worked mainly in psychiatric care, and had consultations involving sickness certification at least once a week were included.
Results
The frequency of problematic sickness certification consultations a few times per year or more often was considered by 87.3% of the psychiatrists; 11.7% handle such cases at least once a week. A majority (60.9%) reported ‘not having enough time with the patient’ at least once a week. The psychiatrists had access to several categories of professionals in their daily work. More than one third certified unnecessarily long sick-leave periods at least once a month due to waiting times for Social Insurance Office investigations or for treatments or investigations within health care.
Conclusion
The majority found it problematic to assess the level and duration of work incapacity, but also other types of problems like unnecessarily long sick-leave periods due to different types of waiting times. The findings have implications for different kinds of organisational and managerial support and training in sickness certification issues, like guidance to assess the level and duration of work incapacity.
doi:10.1186/1472-6963-12-362
PMCID: PMC3480832  PMID: 23075202
Sickness certification; Psychiatry; Sick leave; Physician
3.  Self-reported hearing difficulties, main income sources, and socio-economic status; a cross-sectional population-based study in Sweden 
BMC Public Health  2012;12:874.
Background
Hearing difficulties constitute the most common cause of disability globally. Yet, studies on people with hearing difficulties regarding socio-economic status (SES), work, long-term unemployment, sickness absence, and disability pension are scarce. The aim of the present study was to investigate the main income sources of men and women of working ages with and without self-reported hearing difficulties and associations with gender, age, SES, type of living area, and country of birth.
Methods
A cross-sectional population-based study, using information on self-reported hearing difficulties and SES of 19 045 subjects aged 20–64 years participating in Statistics Sweden’s annual Living Conditions Surveys in any of the years 2004 through 2008. The information was linked to a nationwide database containing data on demographics and income sources. Odds ratios (ORs) and their 95% confidence intervals (CIs) were calculated, using binary logistic regression analysis.
Results
Hearing difficulties increased with age and were more common in men (age-adjusted OR: 1.42 (95% CI: 1.30-1.56)) with an overall prevalence of 13.1% in men and 9.8% in women. Using working men as reference, the OR of having hearing difficulties was 1.23 (0.94-1.60) in men with unemployment benefits and 1.36 (1.13-1.65) in men with sickness benefits or disability pension, when adjusting for age and SES. The corresponding figures in women were 1.59 (1.17-2.16) and 1.73 (1.46-2.06). The OR of having sickness benefits or disability pension in subjects with hearing difficulties was 1.36 (1.12-1.64) in men and 1.70 (1.43-2.01) in women, when adjusting for age and SES and using men and women with no hearing difficulties as reference.
Conclusions
Hearing difficulties were more prevalent in men. After adjustment with age and SES as well as with type of living area and country of birth, a significant association with unemployment benefits was found only in women, and the associations with long-term sickness absence and disability pension tended to be stronger in women.
doi:10.1186/1471-2458-12-874
PMCID: PMC3533986  PMID: 23067045
Disability pension; Hearing loss; Occupation; Self-reported health; Sick leave; Socio-demographic factors; Socio-economic status; Unemployment; Working
4.  Differences in the association between sickness absence and long-term sub-optimal health by occupational position: a 14-year follow-up in the GAZEL cohort 
Objectives
Although sickness absence is a strong predictor of health, little work has examined whether this association varies by occupational position. The aim of this study was to investigate overall and diagnosis-specific sickness absence as a predictor of future long-term sub-optimal health by occupational position.
Methods
Prospective occupational cohort study; 15,320 employees (73% men) aged 37–51. Sickness absences (1990–1992), including 13 diagnostic categories, were examined by occupational position, based on employment grade, in relation to self-rated health measured annually 1993–2006.
Results
60% of employees in higher grade and 22% in lower grade occupations had no sickness absence. Conversely, 40% of employees in lower grade and 9.5% in higher grade occupations had over 30 sick-leave days. Repeated-measures logistic regression analyses adjusted for age, sex, and chronic disease showed employees with over 30 days absence, compared to those with no absence, had approximately double the risk of suboptimal health over the 14-year follow-up in all occupational positions. However, 1–30 days sick-leave was associated with greater odds of suboptimal health in the high; odds ratio 1.48, 95% confidence intervals (1.27–1.72) and intermediate 1.29 (1.15–1.45), but not lower grade occupations 1.06 (0.82–1.38). Differences by occupational position in the association between sickness absence in 13 specific diagnostic categories and sub-optimal health over the ensuing 14 years were limited to stronger associations observed with cancer and mental disorders in the higher grades.
Conclusions
The association between sickness absence of over 30 days a year and future long-term self-rated health appears to differ little by occupational position.
doi:10.1136/oem.2010.060210
PMCID: PMC3186885  PMID: 21242277
Sickness absence; sick leave; self-rated health; longitudinal; multi-level; occupational position
5.  Differences in the association between sickness absence and long-term sub-optimal health by occupational position: a 14-year follow-up in the GAZEL cohort 
Objectives
Although sickness absence is a strong predictor of health, little work has examined whether this association varies by occupational position. The aim of this study was to investigate overall and diagnosis-specific sickness absence as a predictor of future long-term sub-optimal health by occupational position.
Methods
Prospective occupational cohort study; 15,320 employees (73% men) aged 37–51. Sickness absences (1990–1992), including 13 diagnostic categories, were examined by occupational position, in relation to self-rated health measured annually 1993–2006.
Results
60% of employees in higher occupational position and 22% in lower position had no sickness absence. Conversely, 9.5% of employees in higher position and 40% in lower occupational position had over 30 sick-leave days. Repeated-measures logistic regression analyses adjusted for age, sex, and chronic disease showed employees with over 30 days absence, compared to those with no absence, had approximately double the risk of suboptimal health over the 14-year follow-up in all occupational positions. However, 1–30 days sick-leave was associated with greater odds of suboptimal health in the high; odds ratio 1.48, 95% confidence intervals (1.27–1.72) and intermediate 1.29 (1.15–1.45), but not lower occupational positions 1.06 (0.82–1.38). Differences by occupational position in the association between sickness absence in 13 specific diagnostic categories and sub-optimal health over the ensuing 14 years were limited to stronger associations observed with cancer and mental disorders in the higher occupational positions.
Conclusions
The association between sickness absence of over 30 days a year and future long-term self-rated health appears to differ little by occupational position.
doi:10.1136/oem.2010.060210
PMCID: PMC3186885  PMID: 21242277
Adult; Female; Follow-Up Studies; France; epidemiology; Health Status; Humans; Male; Middle Aged; Occupational Diseases; epidemiology; Occupational Health; statistics & numerical data; Occupations; Prospective Studies; Risk Factors; Sick Leave; statistics & numerical data; Social Class; Sickness absence; sick leave; health; longitudinal; multi-level; occupational position
6.  Sickness Absence Due to Specific Mental Diagnoses and All-Cause and Cause-Specific Mortality: A Cohort Study of 4.9 Million Inhabitants of Sweden 
PLoS ONE  2012;7(9):e45788.
Background
Despite the magnitude and increase of sickness absence due to mental diagnoses, little is known regarding long-term health outcomes. The aim of this nationwide population-based, prospective cohort study was to investigate the association between sickness absence due to specific mental diagnoses and the risk of all-cause and cause-specific mortality.
Methods
A cohort of all 4 857 943 individuals living in Sweden on 31.12.2004 (aged 16–64 years, not sickness absent, or on retirement or disability pension), was followed from 01.01.2005 through 31.12.2008 for all-cause and cause-specific mortality (suicide, cancer, circulatory disease) through linkage of individual register data. Individuals with at least one new sick-leave spell with a mental diagnosis in 2005 were compared to individuals with no sickness absence. Hazard ratios (HR) and 95% confidence intervals (CI) were estimated by Cox regression, adjusting for age, sex, education, country of birth, family situation, area of residence, and pre-existing morbidity (diagnosis-specific hospital inpatient (2000–2005) and outpatient (2001–2005) care).
Results
In the multivariate analyses, mental sickness absence in 2005 was associated with an increased risk for all-cause mortality: HR: 1.65, 95% CI: 1.47–1.86 in women and in men: 1.73, 1.57–1.91; for suicide, cancer (both smoking and non-smoking related) as well as mortality due to circulatory disease only in men. Estimates for cause-specific mortality ranged from 1.48 to 3.37. Associations with all-cause mortality were found for all mental sickness absence diagnostic groups studied.
Conclusions
Knowledge about the prognosis of patients sickness absent with specific mental diagnoses is of crucial clinical importance in health care. Sickness absence due to specific mental diagnoses may here be used as a risk indictor for subsequent mortality.
doi:10.1371/journal.pone.0045788
PMCID: PMC3458091  PMID: 23049861
7.  Hearing difficulties, ear-related diagnoses and sickness absence or disability pension - a systematic literature review 
BMC Public Health  2012;12:772.
Background
Hearing difficulties is a large public health problem, prognosticated to be the ninth leading burden of disease in 2030, and may also involve large consequences for work capacity. However, research regarding sickness absence and disability pension in relation to hearing difficulties is scarce. The aim was to gain knowledge about hearing difficulties or other ear-related diagnoses and sickness absence and disability pension through conducting a systematic literature review of published studies.
Methods
Studies presenting empirical data on hearing difficulties or ear-related diagnoses and sick leave or disability pension, published in scientific peer-reviewed journals, were included. Studies were sought for in three ways: in literature databases (Pub-Med, Embase, PsycInfo, SSCI, and Cochrane) through March 2011, through scrutinising lists of references, and through contacts. Identified publications were assessed for relevance and data was extracted from the studies deemed relevant.
Results
A total of 18 studies were assessed as relevant and included in this review, regardless of scientific quality. Fourteen studies presented empirical data on hearing difficulties/ear diagnoses and sick leave and six on these conditions and disability pension. Only two studies presented rate ratios or odds ratios regarding associations between hearing difficulties and sick leave, and only two on hearing difficulties and risk of disability pension. Both measures of hearing difficulties and of sick leave varied considerable between the studies.
Conclusions
Remarkably few studies on hearing difficulties in relation to sickness absence or disability pension were identified. The results presented in them cannot provide evidence for direction or magnitude of potential associations.
doi:10.1186/1471-2458-12-772
PMCID: PMC3560197  PMID: 22966953
Sick leave; Disability pension; Hearing difficulties; Systematic literature review
8.  Sickness Presenteeism Predicts Suboptimal Self-Rated Health and Sickness Absence: A Nationally Representative Study of the Swedish Working Population 
PLoS ONE  2012;7(9):e44721.
Background
Earlier studies have suggested that sickness presenteeism (SP) may be a risk factor for future health problems. The purpose of the present study was to test this in a nationally representative prospective study of Swedish workers.
Methods
Prospective cohort with a representative sample of the Swedish working population surveyed in 2008 and 2010. Odds ratios (OR) with 95% confidence intervals (CI) were calculated using logistic regression.
Results
Those who reported more than 7 days of SP had higher risk of suboptimal SRH compared to those who reported no SP (OR = 5.95; 95% CI 4.98–7.12), also after adjustment for confounders (OR = 1.64; 95% CI 1.30–2.06). Those who reported 1–7 days of SP also had an increased risk before and after adjustments. Inclusion of self-rated physical and psychological work capacity did not attenuate the associations, whereas of emotional exhaustion attenuated the ORs to non-significance for both outcomes, indicating that the health consequences associated with SP are largely related to mental health.
Conclusion
The results strengthen earlier findings suggesting that SP can be a risk factor for future suboptimal general health and sickness absence, particularly through mental health problems. This indicates that asking about SP could yield important information for employers, occupational health practitioners and GPs, possibly leading to more timely intervention that could decrease the risk of future sickness absence and more serious health problems, especially in the mental domain. Further studies of the possible causal pathways between SP and future health development are also warranted, especially since going to work is often seen as desirable also for those with poor health.
doi:10.1371/journal.pone.0044721
PMCID: PMC3439368  PMID: 22984547
9.  Activities and sources of income after a period of long-term sick leave - a population-based prospective cohort study 
BMC Public Health  2012;12:745.
Background
There is limited knowledge about what happens to people after long-term sick leave. The aim of this report was to conduct a prospective study of individuals who were on prolonged sick leave during a particular year, considering their activities and sources of income during subsequent years. To enable comparison of different time periods, we used three cohorts of individuals with different starting years.
Methods
Using data from national registers, three separate cohorts were constructed that included all people living in Sweden who were 20-64 years of age (>5 million) in the years 1995, 2000 and 2005, respectively. The individual members of the cohorts were classified into the following groups based on their main source of income and activity in 1995-2008: on long-term sick leave, employed, old-age pensioner, long-term unemployed, disability pensioner, on parental leave, social assistance recipient, student allowance recipient, deceased, or emigrated.
Results
Most individuals on long-term (> 6 months) sick leave in 1995 were not employed 13 years later. Only 11% of the women and 13% of the men were primarily in employment after 13 years. Instead, a wide range of alternatives existed, for example, many had been granted disability pension, and about 10% of the women and 17% of the men had died during the follow-up period. A larger proportion of those with long-term sick leave were back in employment when 2005 was the starting year for the follow-up.
Conclusions
The low future employment rates for people on long-term sick leave may seem surprising. There are several possible explanations for the finding: The disorders these people may have, might have entailed longstanding difficulties on the labor market. Besides, long-term absence from work, no matter what its causes were, might have worsen the chances of further employment. The economic cycles may also have been of importance. The improving labor market during later years seems to have improved the chances for employment among those earlier on long-term sick leave.
doi:10.1186/1471-2458-12-745
PMCID: PMC3519645  PMID: 22950458
10.  Reliance on social security benefits by Swedish patients with ill-health attributed to dental fillings: a register-based cohort study 
BMC Public Health  2012;12:713.
Background
Some people attribute their ill health to dental filling materials, experiencing a variety of symptoms. Yet, it is not known if they continue to financially support themselves by work or become reliant on different types of social security benefits. The aim of this study was to analyse reliance on different forms of social security benefits by patients who attribute their poor health to dental filling materials.
Methods
A longitudinal cohort study with a 13-year follow up. The subjects included were 505 patients attributing their ill health to dental restorative materials, who applied for subsidised filling replacement. They were compared to a cohort of matched controls representing the general population (three controls per patient). Annual individual data on disability pension, sick leave, unemployment benefits, and socio-demographic factors was obtained from Statistics Sweden. Generalized estimating equations were used to test for differences between cohorts in number of days on different types of social security benefits.
Results
The cohort of dental filling patients had a significantly higher number of days on sick leave and disability pension than the general population. The test of an overall interaction effect between time and cohort showed a significant difference between the two cohorts regarding both sick leave and disability pension. In the replacement cohort, the highest number of sick-leave days was recorded in the year they applied for subsidised replacement of fillings. While sick leave decreased following the year of application, the number of days on disability pension increased and peaked at the end of follow-up.
Conclusions
Ill health related to dental materials is likely to be associated with dependence on social security benefits. Dental filling replacement does not seem to improve workforce participation.
doi:10.1186/1471-2458-12-713
PMCID: PMC3487969  PMID: 22935213
Dental materials; Dental amalgam; Sick leave; Social security; Work; Register based
11.  Sickness Absence following Coronary Revascularisation. A National Study of Women and Men of Working Age in Sweden 1994–2006 
PLoS ONE  2012;7(7):e40952.
Background
Evidence based and gender specific knowledge about sickness absence following coronary revascularisation is lacking. The objective was to investigate sickness absence after a first coronary artery bypass grafting (CABG) or percutaneous coronary intervention (PCI) among women and men in a national Swedish study.
Materials and Methods
All patients 30–63 years of age, who underwent a first CABG (n = 22,985, 16% women) or PCI (40,891, 22% women) in Sweden between 1994 and 2006 were included. Information on sickness absence, co-morbidity, and other patient characteristics was obtained from national registers. Long-term sickness absence (LTSA) was defined as >180 and >90 sick-leave days in the first sick-leave spell following CABG and PCI, respectively. Prevalence ratio (PR) and 95% confidence interval (CI) of LTSA were calculated.
Findings
LTSA followed the interventions in 41% and 36% for CABG and PCI patients, respectively. Women had more often LTSA compared with men, (CABG PR = 1.23: 95% CI 1.19–1.28 and PCI PR = 1.19; 95% CI 1.16–1.23). A history of sickness absence the year before the intervention increased the risk for LTSA after the intervention in both genders. Among women, older age, or being self employed or unemployed was associated with a lower risk for LTSA. Among men previous cardiovascular disease, diabetes and low socio-economic position increased the risk. During the observation period, there was no change in sickness absence rates among PCI patients but an increase among CABG patients adjusting for patient characteristics.
Conclusion
This national study covering a 13-year period shows that long-term sickness absence following coronary revascularisation is common in Sweden, especially among women, and is associated with socio-economic position, co-morbidity, and sickness absence during the year before the intervention. Gender specific scientific knowledge about use and effects of sickness absence following coronary revascularisation is warranted for the patients, the treating physicians, the healthcare sector, and the society.
doi:10.1371/journal.pone.0040952
PMCID: PMC3404085  PMID: 22848415
12.  Physicians who experience sickness certification as a work environmental problem: where do they work and what specific problems do they have? A nationwide survey in Sweden 
BMJ Open  2012;2(2):e000704.
Objectives
In a recent study, 11% of the Swedish physicians below 65 years dealing with sickness certification tasks (SCT) experienced SCT to a great extent as a work environment problem (WEP). This study aimed at exploring which SCT problems those physicians experienced and if these problems varied between general practitioners (GPs), psychiatrists, orthopaedists and physicians working at other types of clinics.
Design
A cross-sectional nationwide questionnaire study.
Setting
All physicians working in Sweden in 2008.
Participants
The 1554 physicians <65 years old, working in a clinical setting, having SCT and stating SCT to a great extent being a WEP.
Outcome measures
Frequency of possibly problematic situations or lack of time, reasons for sickness certifying unnecessarily long, experience of difficulties in contacts with sickness insurance offices, and severity of experienced problems.
Results
In all, 79% of this group of physicians experienced SCT as problematic at least once weekly, significantly higher proportion among GPs (p<0.001) and psychiatrists (p=0.005). A majority (at most 68.3%) experienced lack of time daily, when handling SCT, the proportion being significantly higher among orthopaedists (p=0.003, 0.007 and 0.011 on three respective items about lack of time). Among psychiatrists, a significantly higher proportion (p<0.001) stated wanting a patient coordinator. Also, GPs agreed to a higher extent (p<0.001) to finding 14 different SCT tasks as ‘very problematic’.
Conclusions
The main problem among physicians who experience SCT to a great extent as a WEP was lack of time related to SCT. The proportion of physicians experiencing problems varied in many aspects significantly between the different work clinics; however, GPs were among the highest in most types of problems. The results indicate that measures for improving physicians' sickness certification practices should be focused on organisational as well as professional level and that the needs in these aspects differ between specialties.
Article summary
Article focus
A study of the minority of physicians who state sickness certification tasks to a great extent being a work environment problem.
What problems do these physicians experience in relation to sickness certification?
Do the experienced problems vary with type of work clinic/specialty?
Key messages
A vast majority of these physicians experienced daily lack of time when handling sickness certification tasks.
About half of these physicians found it very problematic to assess level of work incapacity, to manage the two roles as the patient's physician and as a medical expert, and to provide the Social Insurance Office with more extensive sickness certificates.
Measures for improving physicians' sickness certification practices should be focused on organisational as well as professional levels and might need to differ between specialties.
Strengths and limitations of this study
The study was based on a questionnaire sent to all 37 000 physicians in a whole country, and the response rate (61%) could be regarded as relatively high.
Only one question about work environment was included.
doi:10.1136/bmjopen-2011-000704
PMCID: PMC3293140  PMID: 22382120
13.  General practitioners' experiences with sickness certification: a comparison of survey data from Sweden and Norway 
BMC Family Practice  2012;13:10.
Background
In most countries with sickness insurance systems, general practitioners (GPs) play a key role in the sickness-absence process. Previous studies have indicated that GPs experience several tasks and situations related to sickness certification consultations as problematic. The fact that the organization of primary health care and social insurance systems differ between countries may influence both GPs' experiences and certification. The aim of the present study was to gain more knowledge of GPs' experiences of sickness certification, by comparing data from Sweden and Norway, regarding frequencies and aspects of sickness certification found to be problematic.
Methods
Statistical analyses of cross-sectional survey data of sickness certification by GPs in Sweden and Norway. In Sweden, all GPs were included, with 3949 (60.6%) responding. In Norway, a representative sample of GPs was included, with 221 (66.5%) responding.
Results
Most GPs reported having consultations involving sickness certification at least once a week; 95% of the GPs in Sweden and 99% of the GPs in Norway. A majority found such tasks problematic; 60% of the GPs in Sweden and 53% in Norway. In a logistic regression, having a higher frequency of sickness certification consultations was associated with a higher risk of experiencing them as problematic, in both countries. A higher rate of GPs in Sweden than in Norway reported meeting patients wanting a sickness certification without a medical reason. GPs in Sweden found it more problematic to discuss the advantages and disadvantages of sick leave with patients and to issue a prolongation of a sick-leave period initiated by another physician. GPs in Norway more often worried that patients would go to another physician if they did not issue a certificate, and a higher proportion of Norwegian GPs found it problematic to handle situations where they and their patient disagreed on the need for sick leave.
Conclusions
The study confirms that many GPs experience sickness absence consultations as problematic. However, there were differences between the two countries in GPs' experiences, which may be linked to differences in social security regulations and the organization of GP services. Possible causes and consequences of national differences should be addressed in future studies.
doi:10.1186/1471-2296-13-10
PMCID: PMC3320536  PMID: 22375615
14.  Sickness Absence Due to Otoaudiological Diagnoses and Risk of Disability Pension: A Nationwide Swedish Prospective Cohort Study 
PLoS ONE  2012;7(1):e29966.
Background
Hearing difficulties are a large public health problem. Knowledge is scarce regarding risk of disability pension among people who have been sickness absent due to these difficulties.
Methods
A cohort including all 4,687,756 individuals living in Sweden in 2005, aged 20–64, and not on disability or old-age pension, was followed through 2009. Incidence rate ratios (RR) of disability pension with 95% confidence intervals (CI) were estimated using Cox proportional hazard models.
Results
In multivariable models, individuals who had a sick-leave spell due to otoaudiological diagnoses in 2005 had a 1.52-fold (95% CI: 1.43–1.62) increased risk of being granted a disability pension compared to individuals on sick leave due to other diagnoses. Hearing and tinnitus sick-leave diagnoses were associated with risk of disability pension: RR 3.38, 95% CI: 3.04–3.75, and 3.30, 95% CI: 2.95–3.68, respectively. No association was observed between sick leave due to vertigo diagnoses and disability pension whereas otological diagnoses and no sick leave were inversely associated with risk of disability pension compared to non-otoaudiological sick-leave diagnoses. Sick leave due to otoaudiological diagnoses was positively associated with risk of disability pension due to otoaudiological diagnoses and sick leave due to a tinnitus diagnosis was also associated with risk of disability pension due to mental diagnoses. The risk of disability pension among individuals with hearing or tinnitus sick-leave diagnoses was highest in the age group 35–44. Moreover, men had a slightly higher risk.
Conclusion
This large cohort study suggests an increased risk of disability pension among those with sickness absence due to otoaudiological diagnoses, particularly hearing and tinnitus diagnoses, compared to those with sickness absence due to non-otoaudiological diagnoses.
doi:10.1371/journal.pone.0029966
PMCID: PMC3257229  PMID: 22253839
15.  Use and usefulness of guidelines for sickness certification: results from a national survey of all general practitioners in Sweden 
BMJ Open  2011;1(2):e000303.
Objectives
Diagnoses-specific sickness certification guidelines were recently introduced in Sweden. The aim of this study was to investigate to which extent general practitioners (GPs) used these guidelines and how useful they found them, 1 year after introduction.
Design
A cross-sectional questionnaire study. A comprehensive questionnaire about sickness certification practices in 2008 was sent to all physicians living and working in Sweden (n=36 898, response rate 60.6%). In all, 19.7% (n=4394) of the responders worked as GPs.
Setting
Primary healthcare in all Sweden.
Participants
The participating GPs who had consultations concerning sickness certification at least a few times a year (n=4278, 97%).
Main outcome measures
Descriptive statistics and prevalence ratios for the 11 questionnaire items about the use and usefulness of the sickness certification guidelines.
Results
A majority (76.2%) of the GPs reported that they used the guidelines. In addition, 65.4% and 43.5% of those GPs reported that the guidelines had facilitated their contacts with patients and social insurance officers, respectively. The guidelines also helped nearly one-third (31.5%) of the GPs to develop their competence and improve the quality of their management of sickness certification consultations (33.5%). About half experienced some problems when using the guidelines and 43.7% wanted better competence in using them. A larger proportion of non-specialists and of GPs with fewer sickness certification consultations had benefitted from the guidelines.
Conclusions
The national sickness certification guidelines implemented in Sweden were widely used by GPs already a year after introduction. Also, the GPs consider the guidelines useful in several respects, for example, in patient contacts and for competence development.
Article summary
Article focus
Sweden recently introduced national sickness certification guidelines. We investigated:
To what extent did the general practitioners use them 1 year later?
How useful did the general practitioners find them?
Key messages
Already after 1 year, most general practitioners used the guidelines and benefited extensively from them
Two-thirds of the general practitioners reported that the guidelines had facilitated their patient contacts and one-third that it facilitated their contacts with social insurance, other healthcare staff and employers
One-third stated that the guidelines had been helpful in competence development and improved the quality of their management of sickness certification cases
Strengths and limitations of this study
Strengths were the large study group and that all general practitioners in Sweden were included. Also, internationally this is the, so far, without comparison largest study of general practitioner's sickness certification practices. However, the non-response rate of 39% was a limitation, and we have no way of knowing if the non-responders differed with regard to use of the guidelines. However, only 11 of the 163 items in the questionnaire concerned the guidelines, why there is no reason to believe that no response was related to use of the guidelines.
doi:10.1136/bmjopen-2011-000303
PMCID: PMC3244659  PMID: 22189350
16.  Frequency and severity of problems that general practitioners experience regarding sickness certification 
Objective
Tasks involved in sickness certification constitute potential problems for physicians. The objective in this study was to obtain more detailed knowledge about the problems that general practitioners (GPs) experience in sickness certification cases, specifically regarding reasons for issuing unnecessarily long sick-leave periods.
Design
A cross-sectional national questionnaire study. Setting. Primary health care in Sweden.
Subjects
The 2516 general practitioners (GPs), below 65 years of age, who had consultations involving sickness certification every week. This makes it the by far largest such study worldwide. The response rate among GPs was 59.9%.
Results
Once a week, half of the GPs (54.5%) found it problematic to handle sickness certification, and one-fourth (25.9%) had a patient who wanted to be sickness absent for some reason other than medical work incapacity. Issues rated as problematic by many GPs concerned assessing work capacity, prognosticating the duration of incapacity, handling situations in which the GP and the patient had different opinions on the need for sick leave, and managing the two roles as physician for the patient and medical expert in writing certificates for other authorities. Main reasons for certifying unnecessarily long sick-leave periods were long waiting times in health care and in other organizations, and younger and male GPs more often reported doing this to avoid conflicts with the patient.
Conclusion
A majority of the GPs found sickness certification problematic. Most problems were related to professional competence in insurance medicine. Better possibilities to develop, maintain, and practise such professionalism are warranted.
doi:10.3109/02813432.2011.628235
PMCID: PMC3308465  PMID: 22126222
GP; physicians; primary health care; sickness certification; sick leave
17.  Respectful encounters and return to work: empirical study of long-term sick-listed patients' experiences of Swedish healthcare 
BMJ Open  2011;1(2):e000246.
Aims
To study long-term sick-listed patients' self-estimated ability to return to work after experiences of healthcare encounters that made them feel either respected or wronged.
Methods
A cross-sectional and questionnaire-based survey was used to study a sample of long-term sick-listed patients (n=5802 respondents). The survey included questions about positive and negative encounters as well as reactions to these encounters, such as ‘feeling respected’ and ‘feeling wronged’. The questionnaire also included questions about the effects of these encounters on the patients' ability to return to work.
Results
Among patients who had experienced positive encounters, those who also felt respected (n=3327) demonstrated significantly improved self-estimated ability to return to work compared to those who did not feel respected (n=79) (62% (95% CI 60% to 64%) vs 34% (95% CI 28% to 40%)). Among patients with experiences of negative encounters, those who in addition felt wronged (n=993) claimed to be significantly more impeded from returning to work compared to those who did not feel wronged (n=410) (50% (95% CI 47% to 53%) vs 31% (95% CI 27% to 35%)).
Conclusions
The study indicates that positive encounters in healthcare combined with feeling respected significantly facilitate sickness absentees' self-estimated ability to return to work, while negative encounters combined with feeling wronged significantly impair it.
Article summary
Article focus
To what extent can positive and perceived respectful healthcare encounters influence long-term sick-listed patients' ability to return to work?
To what extent can negative and perceived unfair healthcare encounters influence long-term sick-listed patients' ability to return to work?
Key messages
Long-term sick-listed patients' self-estimated ability to return to work is significantly facilitated if healthcare encounters are perceived as respectful.
Long-term sick-listed patients' self-estimated ability to return to work is significantly impeded if healthcare encounters are perceived as unfair.
The net effect of feeling respected was highest among patients with somatic disorders, while the net effect of feeling wronged was highest among patients with psychiatric disorders.
Strengths and limitation of this study
The study sample was large and we obtained quite a high response rate.
The outcome measure was the respondents' self-estimated ability to return to work, not their actual ability.
The findings are based on the views of long-term sick-listed patients and so generalisation may not be possible.
doi:10.1136/bmjopen-2011-000246
PMCID: PMC3211048  PMID: 22021890
18.  Stability and change in health behaviours as predictors for disability pension: a prospective cohort study of Swedish twins 
BMC Public Health  2011;11:678.
Background
Stability or changes of health behaviours have not been studied in association with incidence of disability pension (DP). The aims were to (1) investigate if stability or changes in health behaviours predict DP due to musculoskeletal diagnosis (MSD), (2) to evaluate if an association exists for DP in general, and (3) after taking familial confounding into account.
Methods
The study sample was 16,713 like-sexed twin individuals born in Sweden between 1935-1958 (6195 complete twin pairs) who had participated in two surveys 25 years apart, were alive, and not pensioned at the time of the latest survey. Cox proportional hazards analysis was used to assess the associations (hazard ratios (HR) with 95% confidence intervals (CI)) between stability and change in health behaviours (physical activity, tobacco and alcohol use, body mass index (BMI)), and number of pain locations collected at two time points 25 years apart and the incidence of DP until 2008.
Results
During the follow-up, 1843 (11%) individuals were granted DP with 747 of these due to MSD. A higher proportion of women were granted DP than men. Increase in BMI and stable use of tobacco products were predictors for DP due to MSD (HR 1.21-1.48) and DP in general (HR 1.10-1.41). The stability in the frequency of physical activity and increased frequency of physical activity were protective factors for DP due to MSD only when accounting for familial confounding. However, the number of pain locations (stability, increase, or decrease) was the strongest predictor for future DP due to MSD (HR 3.69, CI 2.99-4.56) and DP in general (HR 2.15, CI 1.92-2.42). In discordant pair analysis, the HRs for pain were lower, indicating potential familial confounding.
Conclusions
Health behaviours in adulthood, including an increase in pain locations were associated with the incidence of DP. The association between physical activity and DP was especially related to adulthood choices or habits, i.e., the individual decision about frequency of exercising. Thus, it is important to e.g. increase public awareness of the potential beneficial effects of exercise throughout life to avoid permanent exclusion from the labour market for medical reasons.
doi:10.1186/1471-2458-11-678
PMCID: PMC3176221  PMID: 21880151
19.  Genetic Liability to Disability Pension in Women and Men: A Prospective Population-Based Twin Study 
PLoS ONE  2011;6(8):e23143.
Background
Previous studies of risk factors for disability pension (DP) have mainly focused on psychosocial, or environmental, factors, while the relative importance of genetic effects has been less studied. Sex differences in biological mechanisms have not been investigated at all.
Methods
The study sample included 46,454 Swedish twins, consisting of 23,227 complete twin pairs, born 1928–1958, who were followed during 1993–2008. Data on DP, including diagnoses, were obtained from the National Social Insurance Agency. Within-pair similarity in liability to DP was assessed by calculating intraclass correlations. Genetic and environmental influences on liability to DP were estimated by applying discrete-time frailty modeling.
Results
During follow-up, 7,669 individuals were granted DP (18.8% women and 14.1% men). Intraclass correlations were generally higher in MZ pairs than DZ pairs, while DZ same-sexed pairs were more similar than opposite-sexed pairs. The best-fitting model indicated that genetic factors contributed 49% (95% CI: 39–59) to the variance in DP due to mental diagnoses, 35% (95% CI: 29–41) due to musculoskeletal diagnoses, and 27% (95% CI: 20–33) due to all other diagnoses. In both sexes, genetic effects common to all ages explained one-third, whereas age-specific factors almost two-thirds, of the total variance in liability to DP irrespective of diagnosis. Sex differences in liability to DP were indicated, in that partly different sets of genes were found to operate in women and men, even though the magnitude of genetic variance explained was equal for both sexes.
Conclusions
The findings of the study suggest that genetic effects are important for liability to DP due to different diagnoses. Moreover, genetic contributions to liability to DP tend to differ between women and men, even though the overall relative contribution of genetic influences does not differ by sex. Hence, the pathways leading to DP might differ between women and men.
doi:10.1371/journal.pone.0023143
PMCID: PMC3151284  PMID: 21850258
20.  Physicians' messages in problematic sickness certification: a narrative analysis of case reports 
BMC Family Practice  2011;12:18.
Background
Many physicians find sickness certification tasks problematic. There is some knowledge about situations that are experienced as problematic, whereas less is understood about how physicians respond to the problems they face. One way to acquire such knowledge is to consider "reflection-in-action", aspects of which are expressed in the physician's interpretation of the patient's story. The aim of this study was to gain knowledge about the meaning content of case reports about problematic sickness certification. Specifically, we looked for possible messages to the colleagues intended to read the reports.
Methods
A narrative approach was used to analyse reports about problematic sickness certification cases that had been written by GPs and occupational health service physicians as part of a sickness insurance course. The analysis included elements from both thematic and structural analysis. Nineteen case reports were used in the actual analysis and 25 in the validation of the results. Main narrative qualities and structural features of the written case reports were explored.
Results
Five types of messages were identified in the case reports, here classified as "a call for help", "a call for understanding", "hidden worries", "in my opinion", and "appearing neutral". In the reports, the physicians tried to achieve neutrality in their writing, and the patients' stories tended to be interpreted within a traditional biomedical framework. In some cases there was an open request for help, in others it was not obvious that the physician had any problems. Overall, the messages were about having problems as such, rather than the specific features of the problems.
Conclusions
The case reports clearly demonstrated different ways of writing about problems that arise during sickness certification, from being neutral and not mentioning the problems to being emotionally involved and asking for help. The general character of the messages suggests that they are also relevant for case reports in problematic areas other than sickness certification. If pertinent relationships can be found between reflection-in-practice and the narrative writing about practice, they will provide an approach to further research concerning consultations perceived as problematic and also to medical education.
doi:10.1186/1471-2296-12-18
PMCID: PMC3079654  PMID: 21481257
21.  Work-related psychosocial events as triggers of sick leave - results from a Swedish case-crossover study 
BMC Public Health  2011;11:175.
Background
Although illness is an important cause of sick leave, it has also been suggested that non-medical risk factors may influence this association. If such factors impact on the period of decision making, they should be considered as triggers. Yet, there is no empirical support available.
The aim was to investigate whether recent exposure to work-related psychosocial events can trigger the decision to report sick when ill.
Methods
A case-crossover design was applied to 546 sick-leave spells, extracted from a Swedish cohort of 1 430 employees with a 3-12 month follow-up of new sick-leave spells. Exposure in a case period corresponding to an induction period of one or two days was compared with exposure during control periods sampled from workdays during a two-week period prior to sick leave for the same individual. This was done according to the matched-pair interval and the usual frequency approaches. Results are presented as odds ratios (OR) with 95% confidence intervals (CI).
Results
Most sick-leave spells happened in relation to acute, minor illnesses that substantially reduced work ability. The risk of taking sick leave was increased when individuals had recently been exposed to problems in their relationship with a superior (OR 3.63; CI 1.44-9.14) or colleagues (OR 4.68; CI 1.43-15.29). Individuals were also more inclined to report sick on days when they expected a very stressful work situation than on a day when they were not under such stress (OR 2.27; CI 1.40-3.70).
Conclusions
Exposure to problems in workplace relationships or a stressful work situation seems to be able to trigger reporting sick. Psychosocial work-environmental factors appear to have a short-term effect on individuals when deciding to report sick.
doi:10.1186/1471-2458-11-175
PMCID: PMC3072951  PMID: 21429193
22.  Disability, sickness, and unemployment benefits among long-term sickness absentees five years before, during, and after a multidisciplinary medical assessment 
Aim:
The aim was to describe how a multidisciplinary medical assessment changed the distribution of long-term sickness absentees between three different forms of social security support during a period of eleven years.
Methods:
The study group (n = 1002) consisted of persons on long-term sickness absence who were referred to a multidisciplinary medical assessment by the Social Insurance Office in Stockholm, Sweden between 1998 and 2007. Register data from the years 1993–2008 were linked to the study group. A calculation was provided for the number of days per person and year on unemployment benefits, sickness benefits, and disability pension, five years before, during, and five years after the assessment. Also, differences in the average number of days per person and year were calculated with one-way analysis of variance.
Results:
The number of days on sickness benefits increased up to the time of multidisciplinary medical assessment, from 69 to 218 days on average. After the assessment there was a decrease in the average number of days on sickness benefits, from 218 to 16 days. Before the assessment the number of days on disability pension was 21, but this increased after the assessment from 104 days to an average of 272 days five years after the assessment. There were age differences regarding number of compensated days, and these were particularly pronounced for disability days after the assessment. Further, there were significant differences between types of diagnosis in relation to average days on disability pension after the assessment.
Conclusion:
The study shows that after a multidisciplinary medical assessment there is a rapid increase in disability pension and a dramatic decrease in sickness benefits. The results indicate that for a large number of persons, a Social Insurance Office referral to an assessment does not improve their chances of returning to work, but rather seems to justify disability pension.
doi:10.2147/JMDH.S17138
PMCID: PMC3065563  PMID: 21468245
multidisciplinary medical assessment; sickness absence; disability pension; sick leave; diagnosis; Sweden
23.  Are self-report of disability pension and long-term sickness absence accurate? Comparisons of self-reported interview data with national register data in a Swedish twin cohort 
BMC Public Health  2010;10:763.
Background
Self-reported disability pension (DP) and sickness absence are commonly used in epidemiological and other studies as a measure of exposure or even as an outcome. The aims were (1) to compare such self-reports with national register information in order to evaluate the validity of self-reported DP and sickness absence, and (2) to estimate the concordance of reporting behaviour in different twin zygosity groups, also by sex.
Methods
All Swedish twins born 1933-1958 who participated in the Screening Across the Lifespan Twin study (SALT) 1998-2003, were included (31,122 individuals). The self-reported DP and long-term sickness absence (LTSA) at the time of interview was compared to the corresponding register information retrieved from the National Social Insurance Agency by calculating the proportions of agreements, kappa, sensitivity, specificity, concordance rates, and chi-square test, to evaluate construct validity.
Results
The proportions of overall agreement were 96% and specificity 99% for both DP and LTSA, while the sensitivity was 70% for DP and 45% for LTSA. Kappa estimates were 0.76 for DP, and 0.58 for LTSA. The proportions of positive agreement were 64% for DP and 42% for LTSA. No difference in response style was found between zygosity groups among complete twin pairs for DP and LTSA. Results were similar for women and men and across age. Kappa estimates for DP differed somewhat depending on years of education, 0.68 (college/university) vs. 0.77 (less than 13 years in school) but not for LTSA.
Conclusions
Self-reported DP data may be very useful in studies when register information is not available, however, register data is preferred especially for LTSA. The same degree of twin similarity was found for truthful self-report of DP and LTSA in both monozygotic and dizygotic twin pairs. Thus, the response style was not influenced by genetic factors. One consequence of this would be that when estimating the relative importance of genetic and environmental effects from twin models, heritability estimates would not be biased.
doi:10.1186/1471-2458-10-763
PMCID: PMC3009651  PMID: 21159191
24.  Sickness-certification practice in different clinical settings; a survey of all physicians in a country 
BMC Public Health  2010;10:752.
Background
How physicians handle sickness-certification is essential in the sickness-absence process. Few studies have focused this task of physicians' daily work. Most previous studies have only included general practitioners. However, a previous study indicated that this is a common task also among other physicians. The aim of this study was to gain detailed knowledge about physicians' work with sickness-certification and of the problems they experience in this work.
Methods
A comprehensive questionnaire regarding sickness-certification practice was sent home to all physicians living and working in Sweden (N = 36,898; response rate: 61%). This study included physicians aged <65 years who had sickness-certification consultations at least a few times a year (n = 14,210). Descriptive statistics were calculated and odds ratios (OR) with 95 % confidence intervals (CI) were estimated for having different types of related problems, stratified on clinical settings, using physicians working in internal medicine as reference group.
Results
Sickness-certification consultations were frequent; 67% of all physicians had such, and of those, 83% had that at least once a week. The proportion who had such consultations >5 times a week varied between clinical settings; from 3% in dermatology to 79% in orthopaedics; and was 43% in primary health care. The OR for finding sickness-certification tasks problematic was highest among the physicians working in primary health care (OR 3.3; CI 2.9-3.7) and rheumatology clinics (OR 2.6; CI 1.9-3.5). About 60% found it problematic to assess patients' work capacity and to provide a prognosis regarding the duration of work incapacity.
Conclusions
So far, most interventions regarding physicians' sickness-certification practices have been targeted towards primary health care and general practitioners. Our results indicate that the ORs for finding these tasks problematic were highest in primary health care. Nevertheless, physicians in some other clinical settings more often have such consultations and many of them also find these tasks problematic, e.g. in rheumatology, neurology, psychiatry, and orthopaedic clinics. Thus, the results indicate that much can be gained through focusing on physicians in other types of clinics as well, when planning interventions to improve sickness-certification practice.
doi:10.1186/1471-2458-10-752
PMCID: PMC3016384  PMID: 21129227
25.  Diagnosis‐specific sick leave as a risk marker for disability pension in a Swedish population 
Objective
To investigate diagnosis‐specific sick leave as a risk marker for subsequent disability pension.
Design
A prospective population based cohort study. Exposure to a new medically certified sick leave episode of more than seven days by diagnosis during 1985 was examined in relation to incident cause‐specific disability pension through 1996.
Participants
The total non‐retired population of one Swedish county aged 16 to 49 years, alive and not in receipt of a disability pension at the end of 1985 (176 629 persons; 51% men).
Main results
To eliminate confounding by sick leaves that translate into a disability pension, the follow up period for disability pension was started five years after the assessment of sick leave. After adjustment for demographic characteristics, the risk of disability pension from mental disorders was 14.1 times higher (95% confidence interval (CI), 12.1 to 16.4) for those with sick leave for mental disorders than for those with no sick leave. The corresponding hazard ratio for sick leave and disability pension within diagnostic category was 5.7 (95% CI, 5.3 to 6.2) for musculoskeletal diseases and 13.0 (7.7 to 21.8) for gastrointestinal diseases. Irrespective of diagnoses, the hazard ratio for sick leave and disability pension was 3.0 (2.9 to 3.1).
Conclusions
Sick leave may provide an important risk marker for identifying groups at high risk of a disability pension, especially for psychiatric diagnoses.
doi:10.1136/jech.2006.055426
PMCID: PMC2652975  PMID: 17873230
disability; pensions; ill health retirement; sickness absence; mental health

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