Statistical Analysis
Patient cohort was divided into two groups according to their weight at the time of surgery: Group 1 < 1000 g and Group 2 ≥ 1000 g. The SPSS statistical programme for Windows, version 22 (SPSS, Inc., Chicago, IL, United States of America) was used for data analysis. The Shapiro–Wilk test was used for the analysis of compliance with normal distribution. Normally distributed continuous data are presented as a mean ± standard deviation together with its ranges in brackets and nominal variables are presented as counts and/or percentages. Non-normally distributed continuous data are presented as a mean ± standard deviation and the median parameters with their interquartile ranges in brackets. For statistical comparison of group data, Student’s t-test was used for normally distributed continuous variables and Mann–Whitney U-test for non-normally distributed continuous variables. Complication and death incidences for both groups were tested for significance using the Ki-Kare ve Fisher’s exact test. All statistical tests were two-sided. A p-value of < 0.05 was considered statistically significant