309 Analysis of the video motion tracking system ‘Kinovea’ to assess surgical movements during robot-assisted radical prostatectomy. pairs with similar matching scores existed a definitive choice was made based on the variable on which the patients matched (appendix 1). Power analysis Ganni, et-al9 observed both experts and novice participants during a basic laparoscopic cholecystectomy procedure using semiautomated video motion tracking via the Kinovea system in order to determine their path length, average instrument movement and number of sudden or extreme movements. This study shows a lower path length for the Experts compared to the novices. These results show it is possible to detect a difference in populations means of 60 cm (127cm for experts, 187 cm in novice analysis) in total path length. For this study we assume the path length in the incontinent patients is similar to that of a novice and the path length in the continent patients is similar to that of an expert. Based on a power calculation using 0.05 as Alpha, a Power of 0.80, and an effect size of 60cm a sample size of 4 patients per subgroup would be sufficient for the main objective of this study. Data analysis Data analysis was performed using SPSS statistics v24 (IBM, NY). Frequency statistics were calculated for patient demographic data and surgeon scores. Correlation between Kinovea results on the one hand and ICIQ-scores, IPSS scores, and EORTC QLQ-PR25 scores were calculated using a Spearman’s Rho test. The Wilcoxon signed-rank test was used to compare differences in results between the matched patient groups. The McNemar’s test was used in order to compare differences in results between the matched patient groups in case of dichotomous variables. Statistical significance was set at p <0,05 based on a two-tailed comparison.
RkJQdWJsaXNoZXIy MTk4NDMw