Statistical analysis
REGRESSION, SEPARATION
Statistical analyses were performed using GraphPad Prism software version 8.0 (GraphPad Software, San Diego, CA, USA). All data are expressed as the mean ± standard deviations. A Chi-squared test on patency outcomes (two-sided, confidence interval 95%) was performed to compare manual and robotic procedures. Time data are expressed as the mean ± standard deviations, and differences between means were analyzed by Student’s t-test; p-values < 0.05 were considered to indicate statistically significant differences between groups. Logarithmic regression of suture time was used for the graphical representation but further analysis was not performed. PCA was used to analyze differences between robotic and manual procedures by using confidence ellipses and their distance to emphasize groups and their separation on the scatter plots. PCA was carried out using the free software PAST (PAleontological STatistics) version 3.