Table 4. Prognostic accuracy of the model for prediction of in-hospital mortality of AECOPD patients.

Predicted probability	Not survived	Survived	PPV% (95%CI)	LR+ (95%CI)	Interpretation
<5.0%	11	364	2.93 (1.47, 5.19)	0.25 (0.12, 0.47)	Low risk
5.0–14.9%	28	325	7.93 (5.34, 11.26)	0.70 (0.44, 1.10)	Intermediate risk
≥15.0%	62	133	31.79 (25.32, 38.83)	3.79 (2.58, 5.54)	High risk
Total	101	822

Abbreviations: CI, confidence interval; PPV, positive predictive value; LR+, positive likelihood ratio.