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author:("collum, N.")
1.  Systematic review and mixed treatment comparison: dressings to heal diabetic foot ulcers 
Diabetologia  2012;55(7):1902-1910.
Foot ulcers in people with diabetes are a common and serious global health issue. Dressings form a key part of ulcer treatment. Existing systematic reviews are limited by the lack of head-to-head comparisons of alternative dressings in a field where there are several different dressing options. We aimed to determine the relative effects of alternative wound dressings on the healing of diabetic foot ulcers.
This study was a systematic review involving Bayesian mixed treatment comparison. We included randomised controlled trials evaluating the effects on diabetic foot ulcer healing of one or more wound dressings. There were no restrictions based on language or publication status.
Fifteen eligible studies, evaluating nine dressing types, were included. Ten direct treatment comparisons were made. Whilst there was increased healing associated with hydrogel and foam dressings compared with basic wound contact materials, these findings were based on data from small studies at unclear or high risk of bias. The mixed treatment comparison suggested that hydrocolloid-matrix dressings were associated with higher odds of ulcer healing than all other dressing types; there was a high degree of uncertainty around these estimates, which were deemed to be of very low quality.
These findings summarise all available trial evidence regarding the use of dressings to heal diabetic foot ulcers. More expensive dressings may offer no advantages in terms of healing than cheaper basic dressings. In addition, evidence pointing to a difference in favour of ‘advanced’ dressing types over basic wound contact materials is of low or very low quality.
Electronic supplementary material
The online version of this article (doi:10.1007/s00125-012-2558-5) contains peer-reviewed but unedited supplementary material, which is available to authorised users.
PMCID: PMC3369130  PMID: 22544222
Diabetic foot ulcers; Dressings; GRADE; Meta-analysis; Mixed treatment comparison; Systematic review
2.  Brief report on the experience of using proxy consent for incapacitated adults 
Journal of Medical Ethics  2006;32(1):61-62.
The Medicines for Human Use (Clinical Trials) Regulations 2004, which came into force in the UK in May 2004, cover the conduct of clinical trials on medicinal products. They allow a legal representative (a person not connected with the conduct of the trial) to consent to the participation of incompetent adults in medical research. Currently, very little is known about how such representatives will make their decisions.
We have experience with proxy consent for older adults in a large, national trial. From 2445 potentially eligible but incapacitated patients, proxy, relative assent resulted in trial participation of only 87 (3.6%) patients. The reasons for this were that a large number of incapacitated patients had no relative available for assent (2286), but also a high proportion of relatives approached refused to provide assent (72/159, 45.3%). In comparison, 17.7% of patients declined participation in the trial.
Proxy consent allowed only a small increase in trial recruitment of incapacitated patients. The fact that a greater proportion of relatives than patients refused to provide assent implies that they were more cautious than the patients themselves, or perhaps used different criteria, when making their decision.
In future research involving incapacitated older patients there is likely to be heavy reliance on proxy consent provision by legal representatives. Our findings imply that consent decisions of legal representatives will not necessarily reflect those of patients themselves.
PMCID: PMC2563273  PMID: 16373526
assent; incapacitated adults; informed consent; proxy consent
3.  Effect of clinical guidelines in nursing, midwifery, and the therapies: a systematic review of evaluations 
Quality in Health Care : QHC  1998;7(4):183-191.
BACKGROUND: Although nursing, midwifery, and professions allied to medicine are increasingly using clinical guidelines to reduce inappropriate variations in practice and ensure higher quality care, there have been no rigorous overviews of their effectiveness, 18 evaluations of guidelines were identified that meet Cochrane criteria for scientific rigor. METHODS: Guideline evaluations conducted since 1975 which used a randomised controlled trial, controlled before and after, or interrupted time series design were identified through a combination of database and hand searching. RESULTS: 18 studies met the inclusion criteria. Three studies evaluated guideline dissemination or implementation strategies, nine compared use of a guideline with a no guideline state; six studies examined skill substitution: performance of nurses operating according to a guideline were compared with standard care, generally provided by a physician. Significant changes in the process of care were found in six out of eight studies measuring process and in which guidelines were expected to have a positive impact on performance. In seven of the nine studies measuring outcomes of care, significant differences in favour of the intervention group were found. Skill substitution studies generally supported the hypothesis of no difference between protocol driven by nurses and care by a physician. Only one study included a formal economic evaluation, with equivocal findings. CONCLUSIONS: Findings from the review provide some evidence that care driven by a guideline can be effective in changing the process and outcome of care. However, many studies fell short of the criteria of the Cochrane Effective Practice and Organisation of Care Group (EPOC) for methodological quality.
PMCID: PMC2483618  PMID: 10339020
4.  Compression therapy for venous leg ulcers. 
Quality in Health Care  1997;6(4):226-231.
PMCID: PMC1055498  PMID: 10177040
5.  A systematic review of compression treatment for venous leg ulcers. 
BMJ : British Medical Journal  1997;315(7108):576-580.
OBJECTIVE: To estimate the clinical and cost effectiveness of compression systems for treating venous leg ulcers. METHODS: Systematic review of research. Search of 19 electronic databases including Medline, CINAHL, and Embase. Relevant journals and conference proceedings were hand searched and experts were consulted. MAIN OUTCOME MEASURES: Rate of healing and proportion of ulcers healed within a time period. STUDY SELECTION: Randomised controlled trials, published or unpublished, with no restriction on date or language, that evaluated compression as a treatment for venous leg ulcers. RESULTS: 24 randomised controlled trials were included in the review. The research evidence was quite weak: many trials had inadequate sample size and generally poor methodology. Compression seems to increase healing rates. Various high compression regimens are more effective than low compression. Few trials have compared the effectiveness of different high compression systems. CONCLUSIONS: Compression systems improve the healing of venous leg ulcers and should be used routinely in uncomplicated venous ulcers. Insufficient reliable evidence exists to indicate which system is the most effective. More good quality randomised controlled trials in association with economic evaluations are needed, to ascertain the most cost effective system for treating venous leg ulcers.
PMCID: PMC2127398  PMID: 9302954
6.  Identification and analysis of randomised controlled trials in nursing: a preliminary study. 
Quality in Health Care  1997;6(1):2-6.
OBJECTIVES: To describe preliminary work undertaken for development of a nursing contribution to the Cochrane Collaboration. To ascertain whether there are randomised controlled trials (RCTs) on nursing care which need to be identified for inclusion in systematic reviews of the effects of health care. DESIGN: Searches by Medline (1966-94) and by hand of 11 nursing research journals from inception to the end of 1994 to identify RCTs and systematic reviews; and a comparison of searches by hand and by Medline for three nursing research journals. MAIN MEASURES: Total number of RCTs identified and number of RCTs published in nursing journals; the sensitivity of Medline searches; and aspects of nursing care evaluated by RCT. RESULTS: The work is ongoing and 522 reports of RCTs and 20 systematic reviews of effectiveness have been identified so far. The sensitivity of Medline searches for RCTs in nursing journals is as low as 36% for one journal and the lack of reference to research design in the title or abstract was the main reason for the lack of sensitivity. CONCLUSIONS: There are RCTs that evaluate aspects of nursing care, and are published in nursing and non-nursing journals, and are largely undertaken by nurses. These must be reviewed in ongoing systematic reviews of the effects of health care (including those undertaken as part of the Cochrane Collaboration). Nursing journals must be hand searched to identify these studies as the lack of reference to study design in the titles and abstracts of nursing trials leads to poor indexing in electronic databases such as Medline.
PMCID: PMC1055436  PMID: 10166598
7.  Preventing and treating pressure sores. 
Quality in Health Care  1995;4(4):289-297.
PMCID: PMC1055341  PMID: 10156400

Results 1-7 (7)