Statistical Analysis
SKIN CONDITION
Data were collected using an Excel spreadsheet and processed using the STATA software, version 17.1 (Stata Corp, State College, Texas). Continuous data are expressed as median and 25°–75° percentiles and were compared using the Mann–Whitney test for independent samples and Wilcoxon signed-rank test for repeated measures in the same subject. Categorical data are expressed as numbers and percentages and compared between cases and controls using the chi-squared test. Follow-up data were investigated using generalized estimating equations, which improved the skin condition and assessed the associated factors as dependent variables. Statistical significance was set at 