Construct validity and reliability of the Canadian Eating Practices Screener to assess eating practices based on 2019 Canada's Food Guide recommendations

Abstract

The objective of this study was to assess the construct validity and reliability of the Canadian Eating Practices Screener/Questionnaire court canadien sur les pratiques alimentaires, which was developed to measure eating practices based on the 2019 Canada’s Food Guide (2019-CFG). From July to December 2021, adults (n=154) aged 18-65 years completed a sociodemographic questionnaire and the screener. Construct validity was assessed by examining variability in screener scores and by comparing screener scores among subgroups with expected differences in eating practices using ANOVA. Reliability, i.e., internal consistency, was assessed by calculating Cronbach’s coefficient alpha. Screener item scores are summed to provide a total score ranging from 21 to 105. The mean screener score was 76 (SD=8.4; maximum, 105), ranging from 53 (1st percentile) to 92 (99th percentile). Differences in total scores in hypothesized directions were observed by age (p=0.006), perceived income adequacy (p=0.09), educational attainment (p=0.002), and smoking status (p=0.09), but not by gender or health literacy level. The Cronbach’s coefficient alpha was 0.79, suggesting acceptable to high internal consistency. Study findings provide preliminary evidence of the screener’s construct validity and reliability, supporting its use to assess eating practices based on the 2019-CFG healthy eating recommendations.