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Influence of race, clinical, and other socio-demographic features on trial participation
Giselle Corbie-Smith1, Catherine M Viscoli, Walter N Kernan
1Department of Social Medicine, Division of General Medicine and Clinical Epidemiology, University of North Carolina at Chapel Hill, Wing D, Medical School, CB#7240, Chapel Hill, NC 27599, USA. gcorbie@med.unc.edu
Abstract:
We assessed whether sociodemographic and clinical characteristics were determinants of clinical trial participation in the Women's Estrogen for Stroke Trial (WEST) by examining data collected on women with a WEST consent visit completed after June 1996. We found no differences in consent rates by education or ethnic group (32% of white women compared with 34% of black women). Conditions associated with the intervention, such as a history of hysterectomy or previous estrogen replacement use, were strongly associated with a woman's decision to participate in this clinical trial. In multivariate models, features independently associated with consent to participate were age (odds ratio [OR] 0.96, 95% confidence interval [CI] 0.94-0.97), hysterectomy (OR 1.78, 95% CI 1.27-2.50), no cognitive impairment (OR 1.70, 95% CI 1.10-2.63), history of volunteerism (OR 1.62, 95% CI 1.02-2.63), and previous estrogen use (RR 1.58, 95% CI 1.08-2.30).
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