Accuracy of self-reported weight in the Women’s Health Initiative

Objective To assess the extent of error present in self-reported weight data in the Women’s Health Initiative, variables that may be associated with error, and to develop methods to reduce any identified error. Design Prospective cohort study. Setting Forty clinical centres in the USA. Participants Women ( n 75 336) participating in the Women’s Health Initiative Observational Study (WHI-OS) and women ( n 6236) participating in the WHI Long Life...