Fig. 3

The calibration curve and decision curve analysis (DCA) of the nomogram. (A) In the calibration curve, perfect prediction corresponded to the “ideal” line, the “Apparent” line represented the entire cohort (n = 554), and the “Bias-corrected” line was plotted through bootstrapping (B = 2000 repetitions), indicating observed nomogram performance. (B) In DCA, the horizontal black line and gray oblique line refer to no patient with SCAP and all patients with SCAP, respectively. SCAP severe community-acquired pneumonia.