Table 2.

Performance of variables in predicting hospital mortality.

	AUC ROC	95% CI	p	Cut-Off	Sensitivity (%)	Specificity (%)
APACHE II score	0.85 ± 0.05	0.76–0.92	<0.0001	13	88.89	71.43
CURB-65	0.65 ± 0.08	0.54–0.76	0.05	2	50	80.95
PSI	0.65 ± 0.08	0.54–0.75	0.05	14	38.89	87.3
Lymphocyte	0.80 ± 0.06	0.70–0.88	<0.0001	0.2	66.67	83.61
Neutrophil	0.68 ± 0.07	0.56–0.78	0.01	4.3	94.44	37.7
NLR	0.88 ± 0.04	0.78–0.94	<0.0001	15.25	100	67.21
PLR	0.75 ± 0.06	0.62–0.87	<0.01	520	77.78	68.33
APACHE II score + NLR	0.91 ± 0.05	0.82–0.99	<0.0001	-	-	-

AUC ROC, area under the receiver operating characteristic curve; CI, confidence interval; APACHE II, Acute Physiology and Chronic Health Evaluation II; NLR, neutrophil-to-lymphocyte ratio; PLR, platelet-to-lymphocyte ratio; PSI, Pneumonia Severity Index.