![]() ![]() We report two dietary surveys of children aged 11–12 years where consent was obtained using two methods: ‘passive’ and ‘active’. ![]() If the proportion of those approached who agree to participate varies with the method used, then this is likely to have implications for the usefulness of the inferences that are ultimately made. In any particular context, there may be several equally acceptable ways by which consent may be obtained. While the main concern is that recruits should be fully informed and free to make their choice, all researchers are conscious of the effect of a low recruitment rate on the representativeness of the sample obtained 1, 2 and thus the generalisability of findings. When the research involves children, the situation is further complicated by the need to obtain consent from the child's legal guardian. A central tenet of health and social research is that no one should be recruited to a study without providing informed consent. ![]()
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