Statistical analysis
Data were presented as means±SD, No. (%), M (P25, P75). Continuous variables were compared by using the t-test or Mann–Whitney U test. Categorical variables were compared using the χ2 test. All statistical analyses were done with the SPSS statistical software (version 26.0, SPSS Corporation, Chicago). The significance threshold was set at P<0.05. We used conditional logistic regression models to compute odds ratios (OR) and 95% confidence intervals (CI).