Table 6.

Values of sensitivity, specificity and predictive values of the nomogram scores at different cut-off values

Nomogram score/predicted probability	Specificity	Sensitivity	Accuracy	PPV	NPV
≥0.10	0.40	0.95	0.51	0.29	0.97
≥0.20	0.65	0.84	0.69	0.38	0.94
≥0.30	0.80	0.63	0.76	0.44	0.90
≥0.40	0.84	0.58	0.79	0.48	0.89
≥0.50	0.95	0.53	0.86	0.71	0.89
≥0.60	0.95	0.32	0.82	0.60	0.85
≥0.70	0.96	0.21	0.81	0.57	0.83
≥0.80	0.96	0.16	0.80	0.50	0.82
≥0.90	0.99	0.05	0.80	0.50	0.80

The predicted probability/nomogram score is a numeric value representing the prediction model score of the individual patient. The nomogram score can be used as a test parameter, and a positive test result can be defined as a score that is equal to or exceeds a specific cut-off value. A negative test result is defined as a score less than the cut-off value.

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