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Multiple Sclerosis (Houndmills, Basingstoke, England)
 
Mult Scler. 2010 August; 16(8): 970–980.
Published online 2010 August. doi:  10.1177/1352458510372394
PMCID: PMC2921149

Quality indicators for multiple sclerosis

Abstract

Determining whether persons with multiple sclerosis (MS) receive appropriate, comprehensive healthcare requires tools for measuring quality. The objective of this study was to develop quality indicators for the care of persons with MS. We used a modified version of the RAND/UCLA Appropriateness Method in a two-stage process to identify relevant MS care domains and to assess the validity of indicators within high-ranking care domains. Based on a literature review, interviews with persons with MS, and discussions with MS providers, 25 MS symptom domains and 14 general health domains of MS care were identified. A multidisciplinary panel of 15 stakeholders of MS care, including 4 persons with MS, rated these 39 domains in a two-round modified Delphi process. The research team performed an expanded literature review for 26 highly ranked domains to draft 86 MS care indicators. Through another two-round modified Delphi process, a second panel of 18 stakeholders rated these indicators using a nine-point response scale. Indicators with a median rating in the highest tertile were considered valid. Among the most highly rated MS care domains were appropriateness and timeliness of the diagnostic work-up, bladder dysfunction, cognition dysfunction, depression, disease-modifying agent usage, fatigue, integration of care, and spasticity. Of the 86 preliminary indicators, 76 were rated highly enough to meet predetermined thresholds for validity. Following a widely accepted methodology, we developed a comprehensive set of quality indicators for MS care that can be used to assess quality of care and guide the design of interventions to improve care among persons with MS.

Keywords: health services research, multiple sclerosis, outcome research, quality indicators

Introduction

Multiple sclerosis (MS) is a neurological disorder that affects 400,000 people in the United States.1 Gaps in care quality exist for many chronic diseases2,3 and have been reported for aspects of MS care.4 However, gaps in many other aspects of MS care have not been studied. Identifying gaps in care quality requires tools for measuring the quality of comprehensive MS care. Understanding why gaps in care quality exist is fundamental to designing healthcare delivery system interventions.5,6

The quality of medical care can be measured through medical care processes or patient outcomes.7 While traditional MS measures such as the Expanded Disability Status Scale (EDSS) scores are appropriate for assessing outcomes of participants enrolled in randomized controlled trials (RCTs), they are less useful outside of such settings because differences in outcomes may be attributable to factors other than the quality of medical care delivered.

As an alternative to patient outcomes, major stakeholders in healthcare have developed and used quality indicators to measure processes of care.8,9 A scientifically rigorous methodological approach called the RAND/UCLA Appropriateness Method (RAM) is a widely utilized technique for developing indicators to measure processes of care in many conditions, including neurological conditions such as stroke,10,11 Parkinson’s disease,12 dementia,13 and epilepsy.14 The goal of RAM is to identify processes of care to which adherence is strongly associated with better health outcomes.

We applied RAM to develop a comprehensive set of quality indicators to measure the quality of healthcare of persons with MS.

Materials and methods

Overview of the stages and techniques pursued in the research study

We used a modified version of the RAM in a two-stage process to (1) identify relevant MS care domains and then (2) draft indicators and rate their validity (Figure 1). Because MS is characterized by a wide spectrum of symptoms and available disease-modifying and symptom-targeted treatments,1517 there is a vast number of potential quality indicators that could be drafted for MS care. By first identifying the most important domains for MS care, the research team could then prioritize a resource-intensive literature review to identify candidate indicators.

Figure 1.
Flow diagram of items drafted by research team and then rated by the two panels.

An overview of the RAM is presented here. RAM is a systematic method of combining evidence with expert judgment and contains characteristics of both the Delphi method and nominal group techniques.1820 First, a research team performs a comprehensive review of the literature. Based on the literature review, the research team drafts a set of items to be rated, and mails these items to panelists to be rated in private without consulting one another. Panelists then mail their ratings back to the research team. A face-to-face meeting of the panelists is then convened to review the de-identified ratings, discuss reasons for disagreement in ratings, and anonymously re-rate the items. Finally, the research team applies pre-determined statistical thresholds of the ratings to identify items of high importance.

Assembly of an expert panel of nationally recognized MS stakeholders

We identified 17 general health and MS-specific organizations that comprehensively represent stakeholders of MS care (see the list in the acknowledgements) and obtained from each organization a list of nominees who could serve on a panel to rate MS care domains. We selected nominees to attain a diverse range of clinical disciplines and geographical locations. We invited our first-choice nominees to participate, and they all accepted, and we refer to this group as Panel 1. Panelists were not told which organization nominated them and were instructed to rate items based on their own perspective and not from the perspective of any organizations to which they are affiliated. The multidisciplinary panel comprised major stakeholders of MS care including four persons with MS, directors of MS patient advocacy organizations, neurologists, rehabilitation physicians, nurses, therapists, and healthcare administrators.

First stage

Generating a comprehensive set of MS care domains

We used three sources of data to inform development of a comprehensive set of MS care domains. First, we interviewed a convenience sample of 10 persons with MS across different mobility stages receiving care at the VA Greater Los Angeles (VA GLA) or University of California, Los Angeles (UCLA) to understand their perspectives on living with MS. A semi-structured interview tool that assessed demographics, MS symptoms, physical functioning, emotional well-being, social functioning, current MS symptoms and care, and outlook for the future was used during these sessions. All interviews were audiotaped, and summaries of each interview were shared with the research team.

Next, the research team performed a systematic review of PubMed using Medical Subject Headings terminology, and then performed reference mining of relevant studies. We also reviewed the websites of the National Guideline Clearinghouse,21 Cochrane Database of Systematic Reviews,22 United States Preventive Services Task Force (USPSTF),23 American Academy of Neurology,24 and the National Multiple Sclerosis Society25 for guidelines, indicators, reviews, and large trials providing or summarizing scientific evidence relevant to MS care. The International Classification of Functioning, Disability and Health established by the World Health Organization was used to organize an initial set of 70 MS care domains.26 The research team deleted domains that were not well supported by the literature review and combined others to reduce redundancy. Individual phone calls with panelists were arranged to obtain feedback on revising the list of MS care domains. A final set of 39 MS care domains were mailed to panelists, including 25 MS symptoms in at least one of four mobility stages of disease: ambulatory without assistance, ambulatory with assistance, wheelchair user, and bed-bound as well as a list of 14 general health domains that are applicable across mobility stages.

Rating MS care domains

Each panelist was mailed a booklet for rating the MS care domains and a monograph summarizing the literature review. First, panelists were instructed to sort an equal number of MS symptoms within a mobility stage of disease into three tiers of order of importance: highest level of importance, second highest level of importance, and third highest level of importance. Second, panelists were instructed to sort general health domains into three tiers of order of importance. Third, panelists designated three general health domains as indispensable to MS care.

The second round of ratings occurred during a subsequent face-to-face meeting of the panel. Panelists were given their own unique summary rating sheets that contained the de-identified initial distribution of ratings by the entire panel, as well as a reminder of that particular panelist’s own ratings. Thus, panelists could determine how their own ratings compared with the distribution of the entire panel’s ratings, but they could not determine the ratings of any other particular panelist. The members of the research team moderated the discussion to limit the role of any dominant members and encouraged participation from the entire panel. Finally, once discussion of a set of domains was complete, the panelists confidentially re-rated the domains using identical criteria to those used in the first round.

Second stage

Generating a comprehensive set of MS quality indicators

The highly rated MS care domains guided a subsequent literature review for drafting quality indicators. Similar of sources used to identify MS care domains were again used to identify potential indicators. Indicators were worded in the form of an ‘IF  THEN …’ or an ‘ALL persons with MS SHOULD…’ statement. An external team of an MS specialist, rehabilitation physician, and an MS nurse not related to the research project reviewed each indicator and suggested further changes to enhance clarity. Ultimately, 88 indicators were drafted across 26 domains of MS care. For Panel 2, several domains were consolidated, reducing the number to 24 domains.

Rating MS quality indicators

All persons who rated the domains in the first year were invited to participate in the second panel, which we refer to as Panel 2. Because the literature review for indicators in Panel 2 contained more clinically technical information than that for domains in Panel 1, additional clinicians were invited for Panel 2 to ensure there was sufficient expertise to evaluate each indicator. Panel 2 comprised 18 persons, including 4 persons with MS.

A rating booklet and a monograph summarizing the literature supporting each indicator were mailed to the members of Panel 2. Panelists were asked to rate each indicator using a nine-point visual scale of validity, with higher numbers indicating greater validity (see Table 1 for definition of validity and visual scale provided to Panel 2). This definition of validity was adapted from prior RAM studies.19,27 Similar to Panel 1, the research team created personalized feedback sheets for panelists that reminded the panelists of their first round rating and provided the anonymous distribution of ratings of the entire panel for each indicator.

Table 1.
Definition of the criteria of validity used by Panel 2 to rate MS quality indicators

The second round of ratings occurred during a subsequent face-to-face meeting. Panelists were given the opportunity to suggest changes in phrasing for each indicator. Next, the research team invited discussion of the indicator, particularly when there was lack of consensus in the first round ratings for an indicator. Panelists then discussed the basis for their first round ratings, then confidentially re-rated the indicators.

Analysis

For the domains of MS symptoms, the one-third of domains with the highest number of panelists rating that domain in the top tier were considered the most important for that stage of disease. For example, of the 22 domains applicable to the MS population who ambulate without assistance, we designated the 8 domains with the highest number of panelists voting them into their top tier as the most highly rated (domains tied for the eighth highest ratings in the top tier were included in the set of most highly rated domains). For the general domains of MS, we included all domains that a panelist identified as indispensable to MS care.

Because the criteria for rating quality indicators used an ordinal scale and the frequencies across the scale values were not normally distributed, indicators were ranked by their median instead of mean ratings. Indicator projects that use a 1–9 rating scale of validity typically accept indicators in the highest tertile of the scale (median ratings of 7, 8, or 9) as valid.3,19,27 Wilcoxon rank-sum tests were used to compare the ratings between the 4 panelists with MS versus the 14 panelists without MS.

While all indicators that meet thresholds for validity are suitable for measuring quality, measurement programs of healthcare organizations do not have the resources to implement all of them. To provide a basis by which a subset of indicators could be selected, we categorized the final set of valid indicators according to four criteria that may be pertinent to a measurement program. The first criterion is the strength of the panel’s rating, defined as a high median rating on validity (≥8) and narrow dispersion of ratings (≥80% of panelists rated indicator in highest tertile). The second criterion is the frequency with which an indicator was expected to be applicable (defined as applicable to at least 20% of cases within a particular year based on prevalence data identified in the literature review). The third criterion is the level of evidence supporting an indicator (defined as results from an RCT or endorsement by one of the following organizations: the US Food and Drug Administration, the Centers for Disease Control, or the USPSTF). The fourth criterion is the means of measurement, identifying those indicators that could be measured using administrative data.

We obtained approval from the Institutional Review Boards at VA GLA and UCLA to conduct this study. Written informed consent was obtained from all subjects participating in the patient interviews.

Results

Among the MS-specific domains, bladder dysfunction, cognitive dysfunction, depression, fatigue, and spasticity were highly rated by Panel 1 in at least three of the four mobility stages (Online Table 1). A total of 16 domains fell in the top tier within at least one stage of disease. The 10 general domains of MS care rated highly by Panel 1 are listed in Online Table 2. The general domains that received the most votes by Panel 1 for being indispensable to MS care were ‘At time of diagnosis: Medical evaluation-appropriateness and timeliness’, ‘Disease-modifying agents’, and ‘Establishment, integration, and coordination of care’.

Table 2.
Abbreviated name of 76 valid indicators

During the face-to-face discussion of indicators by Panel 2, several indicators were reworded for clarity, and a few indicators were consolidated to reduce redundancy, reducing the number of rated indicators by 2 to 86 indicators. There were 76 indicators with a final median rating of at least 7, the pre-set threshold of validity (Table 2 and Online Table 3). The remaining 10 indicators had a median rating below 7 and were excluded from further development (Online Table 4). The domains with the highest number of valid indicators include bladder dysfunction, disease-modifying agents, management of exacerbations and activities of daily living difficulties, and general preventive care (Table 3).

Table 3.
Number of indicators by domain rated by Panel 2, and number of indicators that met thresholds for validity.

The median rating of validity by the 4 panelists with MS was within one point of the median rating of validity by the 14 panelists without MS for 76 (86%) indicators (data not shown). The ratings for two indicators were significantly different between these two groups by Wilcoxon rank-sum tests (p < 0.05): “Assessment of problems with work or education” was rated lower by panelists with MS versus panelists without MS (median rating of 7.5 versus 3) and “All persons with MS should be assessed for spasticity annually” was rated higher by panelists with MS versus panelists without MS (median rating of 9 versus 7).

The 76 valid measures vary in their suitability for different measurement programs (Online Table 3). There are 57 indicators that met a higher threshold of validity. Based on the literature review we concluded that 66 indicators will likely be commonly triggered among persons with MS but 10 indicators will likely be infrequently triggered. There are 19 indicators that are directly supported by results from RCTs or are endorsed by a key healthcare organization. There were 14 indicators in Online Table 3 that met the above three criteria of a higher validity threshold, commonly triggered, and are supported by either RCTs or by a key healthcare organization. Finally, based on our experience of measuring care, we concluded that 12 indicators can be obtained through administrative data but that the other 64 indicators require chart abstraction or patient surveys; of those 12 indicators that can be obtained through administrative data, six are in the domain of general preventive care, and three concern surveillance for adverse effects of disease-modifying agents.

Discussion

Although MS presents with a wide range of symptoms, our multidisciplinary panel reached consensus on which MS symptoms were most important in each mobility stage of the disease. Such symptoms are among those known to have a strong association with health-related quality of life among persons with MS.5,28 Among the general health domains of MS care, the domain of disease-modifying agents was highly ranked, consistent with the large number of RCTs, meta-analyses, and guidelines that recommend their usage.29,30 Perhaps less predictable was that the timeliness and appropriateness of the diagnostic workup was just as highly rated. However, our interviews with persons with MS confirmed findings reported in other qualitative studies that some persons with MS still exhibited anger for being misdiagnosed for years or relief at finally being given a correct diagnosis.3133 Also noteworthy are some indicators that did not meet thresholds of validity. The lowest rated indicator was antibody testing for persons using beta-interferon. Competing guidelines recommend different courses of action about this topic, reflecting uncertainty among experts.34,35

There is a long-standing debate within the field of health services research on the advantages and disadvantages of using patient outcomes versus medical processes of care to measure quality of care.7 While all stakeholders recognize that patient outcomes are extremely important, patient outcomes can be strongly associated with unmodifiable characteristics such as patient age. Therefore, to compare patient outcomes across populations, one needs to perform risk adjustment. The advantages of measuring medical care processes are that they are less likely to be sensitive to risk adjustment, and they represent an aspect of care that clinicians most directly control. However, if processes alone are used to measure quality, it may be necessary to confirm the link between performance of medical processes and improved patient outcomes.36,37

Measurement programs may differ in how they select indicators for implementation. Online Table 3 is provided as a sortable spreadsheet so that readers may prioritize criteria for selecting valid indicators. Programs with a small number of persons with MS should only choose indicators that are expected to be triggered frequently. Programs that use indicators for accountability purposes will prefer those that are supported by RCTs or by key healthcare organizations. Indicators measurable through administrative data are seemingly ideal, but we caution that such indicators originate from only a few domains. In addition, indicators measurable through administrative data may overestimate overall care quality because those care processes may be easier to perform. A large study of geriatric care implemented 145 quality indicators that could only be measured by reviewing the medical records, and adherence to these indicators was 55%; in the same study, 37 other quality indicators were measured using administrative data and medical record review, and the study determined that adherence to these indicators was 83% for either technique.38 To facilitate measurement of a comprehensive set of indicators that do not rely on administrative data, we plan to develop and pilot-test a medical chart abstraction tool and patient survey to measure care for persons with MS.

The 86 indicators presented to Panel 2 are based on a literature review and are not country-specific. Prior studies show that most indicators can be transferred to another country, but only after they are reviewed by clinicians in that country to allow for international variations in clinical practice.39,40

We developed a set of indicators for measuring the comprehensive care of persons with MS. The traditional application of indicators has been in health services research studies that measure whether persons are receiving appropriate care. However, in today’s healthcare environment, we envision a potentially broader use of these indicators such as certifying standards for MS centers, maintenance of board certification for healthcare providers, and application in pay-for-performance programs.

Supplementary Material

Online Table 1:
Online Table 2:
Online Table 3:
Online Table 4:

Acknowledgments

We thank the following organizations for nominating individuals for our multidisciplinary expert panels: American Academy of Neurology, American Academy of Physical Medicine and Rehabilitation, American College of Physicians, Consortium of MS Centers, Heuga Center for MS, International Organization MS Nurses, MS Association of America, MS Coalition, National MS Society, NIH/National Institute of Neurological Disorders and Stroke, Paralyzed Veterans of America, and United Spinal Association.

We thank the following people for participating in one or both panels: Sue Bennett, PT; Dennis Bourdette, MD; Corey Ford, MD, PhD; Elsie E Gulick, PhD, RN; Brian Hutchinson, PT, MSCS; Patricia Johnson; Rosalind Kalb, PhD; Patricia Kennedy, RN, CNP, MSCN; George Kraft, MD, MS; Monte Masten, MD; Deborah Miller, PhD; Karen Modell, JD; Karen Randall, JD; Randall Schapiro, MD; Laura Schwanger, MA; Kay Schwebke, MD, MPH; Anjali Shah, MD; David Stumpf, MD, PhD; and Karen Theriot, MD.

We thank the following individuals for reviewing the wording of indicators: Nancy Sicotte, MD; David Alexander, MD; and Elise Hurley Pacitti, RN, MSN, FNP. We also thank Callene Momtazee, MD for her participation in the literature review for domains ranked by Panel 1. We thank the following individuals for providing research and administrative assistance to the study: Rivkah Bass; Hector Carillo; Andrew Colbert; Marianne Doyle, MSW; Jessika Herrera; Marwa Kaisey; Mary Anne Miller; Amelia Mittleman; Sunberri Murphy; Stefanie Vassar, MS; and Nadine Virani.

Funding Statement

This research was initiated, funded, and supported by the National Multiple Sclerosis Society (HC0094). Dr Cheng is supported by a Career Development Award from NINDS (K23NS058571). Dr Hays was supported in part by the UCLA Resource Center for Minority Aging Research/Center for Health Improvement in Minority Elderly (RCMAR/CHIME), NIH/NIA Grant Award Number P30AG021684, and the UCLA/ Drew Project EXPORT, NCMHD, 2P20MD000182. Dr Giesser has received compensation from Teva Neuroscience and Serono for speaking engagements. Dr Bever received consulting fees from Ingenix.

References

1. Holland NJ. Overview of multiple sclerosis. Clinical Bulletin from the Professional Resource Center of the NMSS 2006: 1–7.
2. Wenger NS, Solomon DH, Roth CP, MacLean CH, Saliba D, Kamberg CJ, et al. The quality of medical care provided to vulnerable community-dwelling older patients. Ann Intern Med 2003; 139: 740–747. [PubMed]
3. McGlynn EA, Asch SM, Adams J, Keesey J, Hicks J, DeCristofaro A, et al. The quality of health care delivered to adults in the United States. N Engl J Med 2003; 348: 2635–2645. [PubMed]
4. Cheng E, Myers L, Wolf S, Shatin D, Cui XP, Ellison G, et al. Mobility impairments and use of preventive services in women with multiple sclerosis: Observational study. Br Med J 2001; 323: 968–969. [PMC free article] [PubMed]
5. Vickrey BG, Edmonds ZV, Shatin D, Shapiro MF, Delrahim S, Belin TR, et al. General neurologist and subspecialist care for multiple sclerosis: Patients' perceptions. Neurology 1999; 53: 1190–1197. [PubMed]
6. Vickrey BG, Shatin D, Wolf SM, Myers LW, Belin TR, Hanson RA, et al. Management of multiple sclerosis across managed care and fee-for-service systems. Neurology 2000; 55: 1341–1349. [PubMed]
7. Donabedian A. Evaluating the quality of medical care. Milbank Mem Fund Q 1966; 44: Suppl, 166–206. [PubMed]
8. Centers for Medicare and Medicaid Services Quality initiatives—general information. Available at: http://www.cms.hhs.gov/QualityInitiativesGenInfo/ (accessed 19 October 2009)
9. The Joint Commission Stroke (stk) core measure set. Available at: http://www.jointcommission.org/PerformanceMeasurement/PerformanceMeasurement/STK+Core+Measures.htm (accessed 19 October 2009)
10. Cheng EM, Fung CH. Quality indicators for the care of stroke and atrial fibrillation in vulnerable elders. J Am Geriatr Soc 2007; 55: Suppl 2, S431–S437. [PubMed]
11. Holloway RG, Vickrey BG, Benesch C, Hinchey JA, Bieber J. Development of performance measures for acute ischemic stroke. Stroke 2001; 32: 2058–2074. [PubMed]
12. Cheng EM, Siderowf A, Swarztrauber K, Eisa M, Lee M, Vassar S, et al. Development of quality of care indicators for Parkinson's disease. Mov Disord 2004; 19: 136–150. [PubMed]
13. Feil DG, MacLean C, Sultzer D. Quality indicators for the care of dementia in vulnerable elders. J Am Geriatr Soc 2007; 55(Suppl 2): S293–S301. [PubMed]
14. Pugh MJ, Berlowitz DR, Montouris G, Bokhour B, Cramer JA, Bohm V, et al. What constitutes high quality of care for adults with epilepsy? Neurology 2007; 69: 2020–2027. [PubMed]
15. Compston A, Confavreux C, McDonald I, Miller D, Noseworthy JH, Smith K, et al. McAlpine's Multiple Sclerosis, 4th edn Philadelphia, PA: Churchill Livingston Elsevier, 2006.
16. Goodin DS, Frohman EM, Garmany GP, Jr, Halper J, Likosky WH, Lublin FD, et al. Disease modifying therapies in multiple sclerosis: report of the Therapeutics and Technology Assessment Subcommittee of the American Academy of Neurology and the MS Council for Clinical Practice Guidelines. Neurology 2002; 58: 169–178. [PubMed]
17. National Institute for Health and Clinical Excellence Multiple sclerosis: management of multiple sclerosis in primary and secondary care. Clinical Guidelines. 8: 2003.
18. Shekelle P. The appropriateness method. Med Decis Making 2004; 24: 228–231. [PubMed]
19. Fitch K, Bernstein S, Aguilar M, Burnand B, LaCalle J, Lazaro P, et al. The RAND/UCLA appropriateness method user's manual. RAND Monograph/Reports 2001.
20. Campbell SM, Braspenning J, Hutchinson A, Marshall MN. Research methods used in developing and applying quality indicators in primary care. BMJ 2003; 326: 816–819. [PMC free article] [PubMed]
21. Agency for Healthcare Research and Quality National guideline clearinghouse. Available at: http://www.guideline.gov/ (accessed 19 October 2009). [PubMed]
22. The Cochrane Collaboration Cochrane reviews. Available at: http://www.cochrane.org/reviews/ (accessed 19 October 2009).
23. Agency for Healthcare Research and Quality United States Preventive Services Task Force. Available at: http://www.ahrq.gov/clinic/uspstfix.htm (accessed 19 October 2009) [PubMed]
24. American Academy of Neurology Practice guidelines. Available at: http://www.aan.com/go/practice/guidelines (accessed 19 October 2009)
25. National Multiple Sclerosis Society Publications for healthcare professionals. Available at: http://www.nationalmssociety.org/for-professionals/healthcare-professionals/publications/index.aspx (accessed 19 October 2009)
26. World Health Organization The international classification of functioning, disability and health. Towards a Common Language for Functioning, Disability and Health ICF, 2002: 1–21.
27. Wenger NS, Shekelle PG. Assessing care of vulnerable elders: Acove project overview. Ann Intern Med 2001; 135: 642–646. [PubMed]
28. Goodin DS. Survey of multiple sclerosis in Northern California. Northern California MS Study Group. Mult Scler 1999; 5: 78–88. [PubMed]
29. Goodkin DE, Reingold S, Sibley W, Wolinsky J, McFarland H, Cookfair D, et al. Guidelines for clinical trials of new therapeutic agents in multiple sclerosis: Reporting extended results from phase III clinical trials. National Multiple Sclerosis Society Advisory Committee on clinical trials of new agents in multiple sclerosis. Ann Neurol 1999; 46: 132–134. [PubMed]
30. National Clinical Advisory Board of the National Multiple Sclerosis Society Disease management consensus statement. Expert Opinion Paper from the National Clinical Advisory Board of the NMSS, 2007: 1–8.
31. Miller CM. The lived experience of relapsing multiple sclerosis: A phenomenological study. J Neurosci Nurs 1997; 29: 294–304. [PubMed]
32. Johnson J. On receiving the diagnosis of multiple sclerosis: managing the transition. Mult Scler 2003; 9: 82. [PubMed]
33. Edwards RG, Barlow JH, Turner AP. Experiences of diagnosis and treatment among people with multiple sclerosis. J Eval Clin Practice. 2008. [PubMed]
34. Sorensen PS, Deisenhammer F, Duda P, Hohlfeld R, Myhr KM, Palace J, et al. Guidelines on use of anti-IFN-beta antibody measurements in multiple sclerosis: Report of an EFNS Task Force on IFN-beta antibodies in multiple sclerosis. Eur J Neurol 2005; 12: 817–827. [PubMed]
35. Goodin DS, Frohman EM, Hurwitz B, O'Connor PW, Oger JJ, Reder AT, et al. Neutralizing antibodies to interferon beta: Assessment of their clinical and radiographic impact. An evidence report: report of the Therapeutics and Technology Assessment Subcommittee of the American Academy of Neurology. Neurology 2007; 68: 977–984. [PubMed]
36. Higashi T, Shekelle PG, Adams JL, Kamberg CJ, Roth CP, Solomon DH, et al. Quality of care is associated with survival in vulnerable older patients. Ann Intern Med 2005; 143: 274–281. [PubMed]
37. Kahn KL, Malin JL, Adams J, Ganz PA. Developing a reliable, valid, and feasible plan for quality-of-care measurement for cancer: how should we measure? Med Care 2002; 40: III73–III85. [PubMed]
38. MacLean CH, Louie R, Shekelle PG, Roth CP, Saliba D, Higashi T, et al. Comparison of administrative data and medical records to measure the quality of medical care provided to vulnerable older patients. Medical Care 2006; 44: 141–148. [PubMed]
39. Steel N, Melzer D, Shekelle PG, Wenger NS, Forsyth D, McWilliams BC. Developing quality indicators for older adults: transfer from the USA to the UK is feasible. Qual Saf Health Care 2004; 13: 260–264. [PMC free article] [PubMed]
40. Marshall MN, Shekelle PG, McGlynn EA, Campbell S, Brook RH, Roland MO. Can health care quality indicators be transferred between countries? Qual Saf Health Care 2003; 12: 8–12. [PMC free article] [PubMed]

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