title: Assessing factorial and convergent validity and reliability of a food behaviour checklist for Spanish-speaking participants in US Department of Agriculture nutrition education programmes.
abstract: OBJECTIVE
  To assess convergent validity, factorial validity, test-retest reliability and internal consistency of a diet quality food behaviour checklist (FBC) for low-literate, low-income Spanish speakers.
  
  
  METHODS
  Participants (n 90) completed three dietary recalls, the Spanish-language version of the US Department of Agriculture (USDA) Household Food Security Survey Module (HFSSM) and the Spanish-language FBC. Factor structure was examined using principal component analysis. Spearman correlation coefficients between FBC item responses and nutrient intakes from 24 h recalls were used to estimate convergent validity. Correlation coefficients were also calculated between FBC item responses at two time points in another group of participants (n 71) to examine test-retest reliability. Cronbach's α coefficient was determined for items within each sub-scale.
  
  
  METHODS
  Non-profit community agencies serving low-income clients, migrant farm worker camps and low-income housing sites in four California counties.
  
  
  METHODS
  Spanish-speaking women (n 161) who met income eligibility for the SNAP-Ed (Supplemental Nutrition Assistance Program-Education).
  
  
  RESULTS
  Factor analysis resulted in six sub-scales. Responses to nineteen food behaviour items were significantly correlated with hypothesized 24 h recall data (with a maximum correlation of 0·44 for drinking milk and calcium) or the USDA HFSSM (0·42 with the food security item). Coefficients for test-retest reliability ranged from 0·35 to 0·79. Cronbach's α ranged from 0·49 for the diet quality sub-scale to 0·80 for the fruit and vegetable sub-scale.
  
  
  CONCLUSIONS
  The twenty-two-item FBC and instruction guide will be used to evaluate USDA community nutrition education interventions with low-literate Spanish speakers. This research contributes to the body of knowledge about this at-risk population in California.
authors.affiliation: Department of Nutrition, University of California, One Shields Avenue, Davis, CA 95616-8669, USA.
authors.forename: Jinan C
authors.initials: JC
authors.lastname: Banna
authors.forename: Marilyn S
authors.initials: MS
authors.lastname: Townsend
mesh_terms: D000069:Acculturation; D000328:Adult; D002140:California / Q000453:epidemiology; D004032:Diet / Q000592:standards / Q000706:statistics & numerical data*; D004034:Diet Surveys; D005163:Factor Analysis, Statistical; D005247:Feeding Behavior; D005260:Female; D057220:Health Literacy; D006630:Hispanic or Latino / Q000706:statistics & numerical data*; D006801:Humans; D011939:Mental Recall; D011203:Poverty; D025341:Principal Component Analysis; D011632:Public Assistance; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D011795:Surveys and Questionnaires / Q000592:standards*