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Various types of visual analogue scales (VAS) are used in epidemiologic and clinical research. This paper reports on a randomized controlled trial to investigate the effects of variations in the orientation and type of scale on bias and precision in cross-sectional and longitudinal analyses. This trial was included in the pilot study of the SU.VI.MAX(More)
To adapt the DUKE Health Profile, a 17-item self-report generic health related quality of life measure cross-culturally in french. A multidisciplinary expert committee was provided with three translations independent of each other, each backtranslated to the original language, and produced a synthesis version equivalent to the original. A cohort of 963(More)
OBJECTIVE Patient compliance is considered necessary for the success of drug treatment in chronic diseases. We document compliance with drug treatment and the factors affecting it in a cohort of patients with rheumatoid arthritis (RA). METHODS A prospective cohort study of 556 patients with RA followed for 3 years in 4 counties: Oslo, Norway; Groningen,(More)
The iron status of a national sample of adults living in France and participating in the SU.VI.MAX cohort, was assessed using serum ferritin and hemoglobin concentrations. Complete data were obtained for 6648 women 35-60 y old and for 3283 men 45-60 y old. Assessment of iron dietary intakes was realized on a subsample of 3111 women and 2337 men who reported(More)
This research aimed to test whether supplementation with a combination of antioxidant vitamins and minerals could reduce the risk of skin cancers (SC). It was performed within the framework of the Supplementation in Vitamins and Mineral Antioxidants study, a randomized, double-blinded, placebo-controlled, primary prevention trial testing the efficacy of(More)
The incidence of rheumatoid arthritis (RA) was estimated in the Lorraine district, eastern France, over the period 1986-1989. Cases were identified from in- and outpatients at the district Rheumatology Hospital Centre, private rheumatologists, general practitioners and by regional media announcements. Supplementary cases resident in the area were sought by(More)
Concepts and methods in professional practices evaluation are often confused. After a description of the classical conceptual framework, we present these methods in an approach in which practice is the principal result to be measured. Thus it makes it possible to apply the traditional epidemiological concepts to the evaluation of the professional practices(More)
BACKGROUND Given the increasing prevalence of obesity among youth over the past decade, prevention has become an international public health priority. PURPOSE To evaluate the 2-year effectiveness of three strategies aimed at preventing overweight and obesity among adolescents in a high school setting. DESIGN PRomotion de l'ALIMentation et de l'Activité(More)
BACKGROUND It has been suggested that a low dietary intake of antioxidant vitamins and minerals increases the incidence rate of cardiovascular disease and cancer. To date, however, the published results of randomized, placebo-controlled trials of supplements containing antioxidant nutrients have not provided clear evidence of a beneficial effect. We tested(More)
OBJECTIVE To investigate whether dietary supplementation with B vitamins or omega 3 fatty acids, or both, could prevent major cardiovascular events in patients with a history of ischaemic heart disease or stroke. DESIGN Double blind, randomised, placebo controlled trial; factorial design. SETTING Recruitment throughout France via a network of 417(More)