Statistical analysis
The sample size was determined using G-Power 3.1 software. Given an effect size of 0.37 based on the Biering-Sørensen testBased on the 95% confidence level in the current study, the minimal clinically important difference (MCID) was assessed using the distribution-based approach, while the minimal detectable change (MDC) was evaluated using the standard error of measurement (SEM) and the following equations: