The levels of significance (P-values) are indicated for both Spearman's correlations and linear regressions. ns: not significant; *: P<0.05; **: P<0.01; ***: P<0.001; DS: diet×size.
We propose a new method of questionnaire content validation via the content validation template (CVT). The CVT automatically rejects all items with poor item-level content validity index (I-CVI) from
