Does the use of passive or active consent affect consent or completion rates or dietary data quality? Repeat cross-sectional survey among school children aged 11–12 years

摘要

ObjectivesAn expectation of research is that participants should give fully informed consent. However, there is also a need to maximise recruitment to ensure representativeness. We explored the impact of passive or active parental consent on consent, completion rates and on dietary data quality in a survey among children aged 11–12 years.