Muzi Na|Alden L. Gross|Keith P. West
Validation of the food access survey tool to assess household food insecurity in rural Bangladesh
Johns Hopkins University|Johns Hopkins University|Johns Hopkins University
perceptionbased likert scale commonly used assess household food insecurity aim study evaluate psychometric properties external construct validity 9item food access survey tool fast populationbased randomized controlled trial participating women n 11992 asked recall frequencies nine food insecurity experiences past 6 months 5point likert scale rasch partial credit model used study item category severity differential item functioning dif literacy status respondents age land ownership household sizes principal component analysis pca nonparametric methods cumulative ordinal logistic regression models applied examine rasch model assumptions namely unidimensionality monotonicity measurement invariance nondif items demonstrated good model fit acceptable values fit statistics infit pca well indices cronbachs alpha 085 scalability coefficient 048 indicated items fit single statistical dimension ordered responses nine items displayed monotonic increasing item category severity expected theoretically nine items flagged statistically significant dif key demographicand socioeconomic subgroups p 0001 however none detected dif considered practically significant given small effect sizes variance explained group membership interaction term 1 total summed score polytomous fast inversely associated household wealth dietary diversity score maternal body mass index demonstrating external construct validity polytomous fast internally externally valid tool measure household food insecurity rural bangladesh validation type studies recommended similar likert food insecurity scales