Learning curve of robot-assisted surgery for
treating early-stage cervical cancer. The x-axis indicates the number of
procedures performed. The y-axis indicates the cumulative sum of success
and failure of the surgical team in terms of recurrence, adjusted for
the probabilities from the risk model. The RA-CUSUM+ (orange) is
designed to detect decrease in surgical performance while RA-CUSUM-
(blue) is designed to detect increase in the surgical performance. Both
curves move upward for surgical failure and downward for surgical
success.
Figure 2.
One-way ANOVA of operation time (start of incision
until end of closure) per group