Karen E. Peterson|James R. Hébert|Thomas G. Hurley|Ken Resnicow|Frances E. Thompson|Geoffrey Greene|Anees Shaikh|Amy L. Yaroch|Geoffrey Williams|Judith Salkeld|Deborah J. Toobert|Andrea Domas|Diane L. Elliot|James W. Hardin|Linda Nebeling
Accuracy and Precision of Two Short Screeners to Assess Change in Fruit and Vegetable Consumption among Diverse Populations Participating in Health Promotion Intervention Trials
University of South Carolina|University of South Carolina|University of Michigan–Ann Arbor|National Cancer Institute|University of Rhode Island|National Cancer Institute|National Cancer Institute|University of Rochester|Brown University|Providence College|Oregon Research Institute|Rush University Medical Center|Oregon Health & Science University|University of South Carolina|National Cancer Institute
two short frequency questionnaires nci 19item fruit vegetable screener fvs single question overall fruit vegetable consumption 1item evaluated ability assess change fruit vegetable fv consumption time response intervention among participants 5 health promotion trials behavior change consortium crosssectional differences correlations fv estimates baseline followup compared fvs n 315 1item n 227 relative multiple 24h recall interviews 24hr fvs significantly overestimated daily intake 127 servings baseline among men 142 159 servings baseline followup respectively women whereas 1item measure significantly underestimated intake time points men 098 serving baseline 075 serving followup women 061 041 serving crosssectional deattenuated correlations 24hr followup 048 fvs 050 1item evaluate capacity 2 screeners assess fv change compared mean posttest effects 24hr treatment group overall gender treatment group differences significant either 24hr 1item among 315 subjects fvs treatment group differences significant overall within gender repeated sample 227 findings suggest multiple 24hr multiple time points adequate sample sizes remain gold standard fv reports biases fvs estimates may reflect participants lifestyles sociodemographic characteristics require examination longitudinal samples representative diverse populations