Statistical analysis
Normality was checked for all variables using descriptive statistics, plots (Q-Q plots and histogram), and normality tests. All variables showed normal distribution, so means and standard deviation (SD) were calculated, and parametric tests were used. Comparisons between the two study groups were done using independent samples t-test with calculation of mean difference and 95% confidence intervals (CI). Comparisons of different parameters between T1 and T2 within each group were done using paired samples t-test. Significance was set at 