What is the effect of peer support on diabetes outcomes in adults? A systematic review.

AIM: There is increasing interest in the role that peers may play to support positive health behaviours in diabetes, but there is limited evidence to inform policy and practice. The aim of this study was to systematically review evidence of the impact and effectiveness of peer support in adults living with diabetes. METHODS: We searched the Cochrane Library, MEDLINE, PubMed, EMBASE and CINHAL for the period 1966-2011, together with reference lists of articles for eligible studies. Data were synthesized in a narrative review. RESULTS: Twenty-five studies, including fourteen randomized, controlled or comparative trials, met the inclusion criteria. There was considerable heterogeneity in the design, setting, outcomes and measurement tools. Peer support was associated with statistically significant improvements in glycaemic control (three out of 14 trials), blood pressure (one out of four trials), cholesterol (one out of six trials), BMI/weight (two out of seven trials), physical activity (two out of five trials), self-efficacy (two out of three trials), depression (four out of six trials) and perceived social support (two out of two trials). No consistent pattern of effect related to any model of peer support emerged. CONCLUSIONS: Peer support appears to benefit some adults living with diabetes, but the evidence is too limited and inconsistent to support firm recommendations. There remains a need for further well-designed evaluations of its effectiveness and impact. Key questions remain over its suitability to the needs of particular individuals, populations and settings, how best to implement its specific components and the sustainability of its effects.

Clinical and cost effectiveness of mechanical support for severe ankle sprains: design of a randomised controlled trial in the emergency department [ISRCTN 37807450].

BACKGROUND: The optimal management for severe sprains (Grades II and III) of the lateral ligament complex of the ankle is unclear. The aims of this randomised controlled trial are to estimate (1) the clinical effectiveness of three methods of providing mechanical support to the ankle (below knee cast, Aircast brace and Bledsoe boot) in comparison to Tubigrip, and (2) to compare the cost of each strategy, including subsequent health care costs. METHODS/DESIGN: Six hundred and fifty people with a diagnosis of severe sprain are being identified through emergency departments. The study has been designed to complement routine practice in the emergency setting. Outcomes are recovery of mobility (primary outcome) and usual activity, residual symptoms and need for further medical, rehabilitation or surgical treatment. Parallel economic and qualitative studies are being conducted to aid interpretation of the results and to evaluate the cost-effectiveness of the interventions. DISCUSSION: This paper highlights the design, methods and operational aspects of a clinical trial of acute injury management in the emergency department.

Global cross-ratio models for bivariate, discrete, ordered responses.

A family of statistical models is presented for bivariate, discrete response to a regressor when both components of the response have ordered categories. Association between components is expressed in terms of global cross-ratios, cross-product ratios of quadrant probabilities, for each double dichotomy of the response table of probabilities into quadrants (Pearson and Heron, 1913, Biometrika 9, 159-315). These models are extensions to the work of Plackett (1965, Journal of the American Statistical Association 60, 516-522) and Mantel and Brown (1973, Biometrics 29, 649-665). The marginal cumulative probabilities may satisfy linear logistic or other generalized linear models (McCullagh, 1980, Journal of the Royal Statistical Society, Series B 42, 109-142). An analysis of patients' postoperative pain level and medication frequency illustrates these methods.

Modern or traditional? A study of treatment preference for neuropsychiatric disorders in Botswana.

Subjects in Botswana were asked to state their preference between modern (doctor or nurse) or indigenous (traditional or religious healer) care for three case vignettes of epilepsy, psychosis, and tuberculosis. Nurses, medical patients, and a general village population were studied. Many subjects preferred modern care for all disorders, whilst a small number favoured indigenous treatment only. A significant percentage discriminated between disorders, choosing indigenous care for some and modern for others. Indigenous care was most favoured for epilepsy, and least for tuberculosis. Psychosis took an intermediate position. The size of the discriminating group varied between populations, but the overall pattern of attitudes remained the same. Neither demographic factors nor aetiological beliefs consistently identified those who choose indigenous care.