Statistical Analysis
SPSS Statistics software version 25.0 (IBM, Armonk, NY) was used for all statistical analyses. Shapiro – Wilk test was used to test the normal distribution of numerical variables. Continuous variables were specified as appropriate means and standard deviations or medians and interquartile ranges. The χ2 and Fisher’s exact tests were applied to categorical variables. The Student T-test and Mann‐Whitney U tests were used for continuous variables. P value of less than 0.05 was defined as statistical significance.