Table 3. Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of the number of independent predictors for 30-day neurological sequelae in patients with carbon monoxide poisoning.

Number of Variables	Sensitivity	Specificity	PPV	NPV
1	77.0 (107/139)	47.1 (56/119)	62.9 (107/170)	63.6 (56/88)
2	11.5 (16/139)	99.2 (118/119)	94.1 (16/17)	49.0 (118/241)

All data are % (number).