Fig. 1.
The global rating scale used in the Objective Structured Assessment of Technical Skills (OSATS) [2], which we used to score the skills of each surgical trainee in performing or assisting in real operations. Full marks are 35 points on 7 items and 30 points on 6 items, respectively, as a surgeon and as an assistant (in the case of assistant, ‘Use of Assistant’ is excluded from the scoring)