Statistical analysis
The analysis was performed using the SPSS 20.0 program. Normality was
assessed using the Shapiro-Wilks test. The variables were expressed as
means and standard deviations. Chi-square was used to compare
categorical variables. To compare values between groups, the independent
Student’s T test was used and the intra-group comparison was the paired
Student’s T test. It was considered as significant when p
<0.05. The delta value (∆) was found by subtracting the
preoperative value from the value found on the day of discharge.