Bette Liu|Heather Young|Francesca L. Crowe|Victoria S. Benson|Elisabeth A Spencer|Timothy J. Key|Paul N. Appleby|Valerie Beral
Development and evaluation of the Oxford WebQ, a low-cost, web-based method for assessment of previous 24 h dietary intakes in large-scale prospective studies
UNSW Sydney|University of Oxford|University of Oxford|University of Oxford|University of Oxford|University of Oxford|University of Oxford|University of Oxford|University of Oxford
describe development oxford webq webbased 24 h dietary assessment tool developed repeated administration large prospective studies report preliminary assessment performance estimating nutrient intakeswe developed oxford webq repeated testing sufficiently comprehensive easy use latest version compared nutrient intakes volunteers completed oxford webq intervieweradministered 24 h dietary recall dayoxford uka total 116 men womenthe webq took median 125 interquartile range 108163 min selfcomplete nutrient intakes estimated automatically contrast intervieweradministered 24 h dietary recall took 30 min complete 30 min code compared 24 h dietary recall mean spearmans correlation 21 nutrients obtained webq 06 majority 05 09 mean differences intake less 10 nutrients except carotene vitamins b12 rare occasions food item reported one assessment method frequent systematically different methodscompared interviewerbased 24 h dietary recall webq captures similar food items estimates similar nutrient intakes single days dietary intake webq selfadministered nutrients estimated automatically providing lowcost method measuring dietary intake largescale studies