Table 4.

Cox Proportional Hazards Analysis of Risk Factors Associated with PNM 28-Days Mortality

Variable	P	HR	95.0% C.I.
Malignant tumor	0.179	1.417	0.853–2.355
Hypertension	<0.001	2.641	1.563–4.464
Reoperation	0.158	0.685	0.406–1.157
ICU	0.166	1.514	0.842–2.720
EVD	0.003	2.196	1.317–3.662
LD	0.014	1.818	1.126–2.936
AMV	0.612	1.170	0.639–2.142
TEM(°C)	0.453	1.027	0.958–1.101
HAP	0.257	1.355	0.801–2.290