Lenore Arab|Chi?Hong Tseng|Alfonso Ang|Patricia Jardack
Validity of a Multipass, Web-based, 24-Hour Self-Administered Recall for Assessment of Total Energy Intake in Blacks and Whites
University of California, Los Angeles
date webbased 24hour recalls validated using objective biomarkers 2006 2009 validity 6 webbased dietday 24hour recalls tested among 115 black 118 white healthy adults los angeles california using doubly labeled water method results compared results diet history questionnaire food frequency questionnaire developed national cancer institute authors performed repeated measurements subset 53 subjects approximately 6 months later estimate stability doubly labeled water measurement attenuation factors dietday recall 030 blacks 026 whites diet history questionnaire attenuation factors 015 017 blacks whites respectively adjusted correlations true energy intake recalls 050 047 blacks whites respectively dietday recall diet history questionnaire 034 036 blacks whites respectively rate underreporting 30 calories lower recalls questionnaire 25 41 vs 34 52 blacks whites respectively findings suggest webbased dietday dietary recalls offer inexpensive widely accessible dietary assessment alternative validity equally strong among black white adults validity webadministered recall superior paper food frequency questionnaire