Table 2 Results of surgery. The first part of this table provides detailed information on the time needed to perform a flexible ureterorenoscopy. The mean surgery time for each group (all, consultants and residents) is given in minutes together with the standard deviation. The second part of this table summarizes the surgical outcome. For each event (stone-free rate, rate of reintervention and complications) and each group (all, consultants and residents) the number of patients as well as their percentage in relation to the total number of patients are given. Furthermore, complications are classified according to the Clavien-Dindo Classification. For each grade the total number of patients is given.
