Modified abdominal wall retractor for total laparoscopic esophagojejunostomy in gastric cancer

Figure 1 The learning curve using the moving average method. The solid line represents the anastomosis duration for each patient in chronological order, and the dashed line indicates the learning curve derived from the moving average method. The curve began to stabilize after performing approximately 11 procedures, suggesting the proficiency of this technique.

Figure 2 The learning curve using the cumulative sum method. The curve peaks at the 11^th procedure, indicating the inflection point of the learning phase. CUSUM: Cumulative sum.