The objective of this study—a substudy to a phase I bioequivalence study—was to compare the effect of standard and concise consent forms on research volunteers’ comprehension of and satisfaction with consent forms, as well as to assess the effect of select volunteer characteristics, such as financial motivations to participate in research, on their comprehension. A 36-item questionnaire measured volunteers’ comprehension, satisfaction, and motivations for participation. Volunteers were randomized to the standard Pfizer consent form or a concise, easier-to-read form. We (...) approached 139 volunteers to participate, and 138 completed the questionnaire . The cohorts did not differ in sociodemographic characteristics. We found that the average comprehension scores for the standard consent form cohort and the concise consent cohort were about the same, and that satisfaction with the consent form was high in both cohorts. Surprisingly, volunteers with a financial motivation had significantly greater comprehension of the study. (shrink)

Placebo-controlled trials are controversial when individuals might be denied existing beneficial medical interventions. In the case of malaria, most patients die in rural villages without healthcare facilities. An artesunate suppository that can be given by minimally skilled persons might be of value when patients suddenly become too ill for oral treatment but are several hours from a facility that can give injectable treatment for severe disease. In such situations, by default, no treatment is (or can be) given until the patient (...) reaches a facility, making the placebo control design clinically relevant; alternative bioequivalence designs at the facility would misrepresent reality and risk incorrect conclusions. We describe the ethical issues underpinning a placebo-controlled trial in severe malaria. To protect patients and minimise risk, all patients were referred immediately to hospital so that each had a higher chance of prompt treatment through participation. There was no difference between artesunate and placebo in patients who reached clinic rapidly; among those who could not, a single artesunate suppository significantly reduced death or permanent disability, a finding of direct and indirect benefit to patients in participating villages and elsewhere. (shrink)