3.5 Construct validity of Tr-PedsQLTM 3.0 EoE Module
The good correlations between Tr-PEESS v2.0 scores and Tr-PedsQLTM 3.0 EoE Module Total, Symptoms Total, Symptoms I, and Symptoms II scores supported convergent validity. The low (r<0.4) or lack of correlation between the dimensions of communication and food feeling of Tr-PedsQLTM 3.0 EoE Module with Tr-PEESS v2.0 also demonstrated the divergent validity of the instrument (Table 5).
Finally, the power of the study was calculated with a two-tailed test, an effect size of |r| = 0.67, a significance level (α err prob) of 0.05, and a total sample size of 33, the calculated power (1-β err prob) was found to be 0.99.