Table 2. Multivariate Cox regression analysis of 90-day mortality predictors.

Variable	Hazard ratio	95% CI	p value
Age > 65	1.43	0.97-2.11	0.0647
Gender, male	1.05	0.73-1.51	0.7681
BMI	0.97	0.94-1.00	0.0757
SOFA	1.10	1.02-1.18	0.0057
APACHE II	1.03	1.00-1.07	0.0229
Septic shock	0.84	0.52-1.37	0.5046
Arterial hypertension	1.35	0.93.1.98	0.1116
History of cancer	1.62	1.08-2.43	0.0182
COPD	0.98	0.64-1.51	0.9496
Chronic kidney disease	2.25	1.46-3.46	0.0002
Diabetes mellitus (IDDM)	1.62	0.99-2.64	0.0527
Diabetes mellitus (NIDDM)	1.65	0.96-2.83	0.0684
Coronary heart disease	0.89	0.48-1.66	0.7359
Chronic liver disease	0.61	0.29-1.30	0.2093
History of stroke	0.75	0.36-1.57	0.4582
Gram-positive infection	0.98	0.61-1.58	0.9635
Gram-negative infection	0.94	0.65-1.36	0.7755
Fungal infection	0.80	0.55-1.16	0.2509
Elective surgery	0.90	0.55-1.45	0.6725
Emergency surgery	0.80	0.51-1.26	0.3466