Fig. 3. (A) Operative time and CUSUM curve of RPLDG. Black line indicates breakthrough point (24th case). (B) Operative time and CUSUM curve of CLDG. Black line indicates breakthrough point (26th case).
CUSUM = cumulative sum; RPLDG = reduced port laparoscopic distal gastrectomy; CLDG = conventional laparoscopic distal gastrectomy.