High Eckardt score and previous treatment were associated with poor postperoral endoscopic myotomy pain control: A retrospective study

Figure 4 The nomogram was constructed from 3 parameters (Table 2). To calculate a patient’s risk for poor pain control, defined as a visual analog scale score greater than or equal to 4 at 12 h after peroral endoscopic myotomy (POEM), each parameter was assigned a point by its vertical correspondence to the "points" axis, and the sum of the points was plotted on the “total points” axis. The risk for poor post-POEM pain control is the value on the “Risk of poor pain control” axis at a vertical position from the corresponding point on the “Total Points” axis.