2.7. Statistical Analysis
SECONDARY
Data are presented as means with standard deviation (SD) or as counts with percentages. Statistical comparisons between groups were made using t test for continuous variables and Pearson’s chi-square for categorical variables. Mean changes in primary and secondary outcomes between three months and baseline values were assessed using analysis of covariance (ANCOVA) with baseline values as covariates. Effect size (d) was calculated by using the method of Cohen where an effect size of 0.20 is considered small, 0.50 moderate, and 0.80 large. CIs for the effect sizes were obtained by bias-corrected bootstrapping (10,000 replications). Statistical analyses were performed using statistical software (Stata, release 17.0, Stata Corp., College Station, TX, USA).