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.