[Dietary literacy questionaire for school-age children's daily diet providers and its reliability and validity]

Development of dietary literacy questionnaire for school-age children's diet providers and evaluation of its reliability and validity.

Based on the main theoretical basis of dietary literacy definition, a pool of dietary literacy questionnaires for school-age children's daily diet providers was prepared by expert group discussion through the Delphi method. The initial scale was formed by method such as expert panel discussions. A stratified cluster sampling method was used to investigate the daily dietary providers of 1137 urban and rural children in Hefei in November 2018. The t-test and Pearson correlation coefficient were used to analyze the decision value, correlation analysis and internal consistency analysis. The structural equation model was constructed to evaluate the structural validity of the questionnaire. One week after the interval, 90 school-age children's daily diet providers using random sampling were retested, and the test-retest reliability was analyzed. The reliability of the questionnaire was evaluated using Cronbach'α, Guttman coefficient, and structural validity. Further analysis of the differences in the educational level of children's diet providers and the scores of urban and rural questionnaires.

A total of 1043 valid questionnaires were returned. 894(85. 7%) were children's parents and 128(12. 3%) were children's grandparents or maternal grandparents. After expert group discussion, the questionnaire preliminarily identified four first-level indicators to provide attitudes, actions, skills and environment for daily dietary providers about children's meals. The average authority coefficient of experts was 0. 87. The study finally retained 30 items, including the four dimensions of attitudes, actions, skills and environment provided by the daily diet providers of school-age children to the children's diet. The cumulative variance contribution rate was 52. 470%. The Cronbach' α coefficient of the questionnaire was 0. 874, the split-half reliability was 0. 813, and the test-retest reliability was 0. 878. Structural equation model fitting index: χ~2/df=2. 28, RMSEA=0. 042, NFI=0. 841, GFI=0. 927, AGFI=0. 912, RFI=0. 821, IFI=0. 904, TLI=0. 891, CFI=0. 903. In addition, the differences in scores of different education levels, urban and rural questionnaires and different dietary behaviors of children were statistically significant(P<0. 05), and the questionnaires had good discriminant validity.

The reliability and validity of the dietary literacy questionnaire for school-age children's daily diet providers is good, and it can provide reference for evaluating the dietary quality of school-age children's dietary providers.