Figure 7.

The calibration plots of (A) the training cohort and (B) the internal validation cohort. The x-axis represents the nomogram-predicted probability, and the y-axis represents the actual probability of surgical risks of concomitant endoscopic septoplasty during En-DCR. A perfect prediction would correspond to the 45° blue dashed line. The red solid line represents the entire cohort in the training cohort (n=157) and internal validation cohort (n=68), respectively. The green solid line is the bias-corrected bootstrapping (B=1,000 repetitions), indicating observed nomogram performance. En-DCR, endonasal endoscopic dacryocystorhinostomy.