Figure 2

Learning curve analysis of reduced-port totally robotic gastrectomy. (A) Actual operation times for reduced-port totally robotic distal subtotal gastrectomy. (B) Fitted operation times by a nonlinear regression model for reduced-port totally robotic distal subtotal gastrectomy (A, stable operation time; C, converged case number). (C) Fitted operation time after adjusting for confounding variables of reduced-port totally robotic distal subtotal gastrectomy (A, stable operation time; C, converged case number).