Validation of a self-reported shelf inventory to measure food purchase behavior.
A mailed, self-reported shelf inventory was validated for use as a tool in assessing the impact of a community nutrition intervention that included a point-of-purchase component. The self-reported inventory was evaluated for overall accuracy as well as for the effects of gender, age, and shopping responsibility on accuracy. In addition, the food-shelf inventory was compared with a specific food frequency questionnaire. Specificity and sensitivity were calculated for self-reported inventories using an interviewer-completed, same-day inventory as the gold standard. Overall sensitivity was 86% and 87%, and overall specificity was 92% and 90% in two validation studies. Results show that the mailed, self-reported shelf inventory is a valid measure of the presence or absence of particular foods in households. As such, it may be a useful tool for assessing the impact of point-of-purchase nutrition interventions.
Crockett
S J
SJ
College for Human Development, Syracuse University, NY 13244-1250.
Potter
J D
JD
Wright
M S
MS
Bacheller
A
A
D000328:Adult; D000368:Aged; D015930:Diet Records; D005260:Female; D005518:Food Preferences; D006801:Humans; D007407:Interviews as Topic; D008297:Male; D008875:Middle Aged; D008910:Minnesota; D009658:North Dakota; D052756:Nutritional Sciences / Q000193:education*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012737:Sex Factors; D011795:Surveys and Questionnaires