Statistical analysis
REGRESSION
Statistical analysis and descriptive statistics were performed using the SPSS software (version 25.0, IBM SPSS Inc., Chicago, Illinois, USA), and data are given as absolute frequency and mean ± standard deviation. Differences between the LC were assessed using the t-test for independent samples in parametric data and the Mann–Whitney U test for independent samples in the case of non-parametric data. For binary endpoints, group differences were calculated using the Chi-square test. Multivariable regression was performed to assess the influence of demographic parameters and personal characteristics on surgical performance. A 