Table 3. Differential efficacy of the nomogram at different predicted probability.

Predicted probability	Sensitivity	Specificity	PPV	NPV
Training cohort
0.50	95.8%	25.0%	80.2%	65.0%
0.60	90.9%	38.5%	82.4%	57.1%
0.70	80.6%	65.4%	88.1%	51.5%
0.80	61.2%	84.6%	92.7%	40.7%
Validation cohort
0.5	100.0%	23.8%	60.0%	100.0%
0.6	100.0%	38.1%	64.9%	100.0%
0.7	79.2%	47.6%	63.3%	66.7%
0.8	50.0%	71.4%	66.7%	55.6%

PPV, positive predictive value; NPV, negative predictive value.