Statistical analysis
SD
Data were analyzed by statistical package for the social sciences (SPSS) software version 22 (SPSS, Inc., Chicago, USA). The normality of the data distribution was evaluated by the Shapiro-Wilk test. Comparing the categorical variables between the groups performed by the Chi-square test. Within-group and between-group comparisons were done by the Wilcoxon and the Mann-Whitney u-tests, respectively. The descriptive variables were reported by means ± SD or median (IQR) for quantitative data and number (percentage) for qualitative ones. To determine the reliability of the Persian format of CNAQ, the internal consistency of the questions was tested by Cronbach’s Alpha. Test-retest was used to determine the repeatability of the questions (by using Pearson’s correlation analysis). The content validity of the questions was evaluated by 15 nutritionists and the content validity ratio (CVR) and content validity index (CVI) of each question were measured. A P-value < 0.05 was considered statistically significant.