부산대학교 도서관

BackgroundMany studies rely on self-reported anthropometric data. While paper-based self-reports have been the standard collection mode, the number of studies collecting self-reported data via the Web is increasing rapidly. Although numerous studies have shown good agreement between self-reported and measured weight using paper-based questionnaires, the validity of using the Web to inquire about weight is unknown. ObjectiveThe objective of this study was to validate Web-based self-reports of bodyweight compared to weight measured at the study center. MethodsThe validity of weight self-reported via the Web was assessed by comparing self-reports against measurements of weight in a convenience sample of 149 individuals (77.2% women, 115/149), aged 20-65 years. Study participants self-reported their weight via a Web-based questionnaire and thereafter had their weight measured in the research center. ResultsThe Spearman correlation coefficient between self-reported and measured weight was 0.98 (P