3.3 Learning curve analysis of the ZF approach
An analysis of mean procedure time showed a statistically significant difference after the first 150 cases that remained significant in subsequent procedures. As shown in Figure 3, a downward slope of the interpolating line can be observed with a significant drop after the first 150 cases. The results from the statistical analysis of the learning curve can be found in the supplementary data in Table S2.
3.4 Follow-up