Table 2.

Univariate and multivariate analysis for 28-day mortality.

Characteristics	Univariate OR [95% CI]	Multivariate OR [95% CI]	p-value
Age, years	1.019 [1.010–1.028]	1.014 [1.003–1.025]	0.009
Chronic lung disease	1.851 [1.275–2.687]
Pulse rate, beats/min	1.014 1.009–1.019]
Pneumonia	2.465 [1.947–3.122]	2.113 [1.609–2.775]	<0.001
Urinary tract infection	0.648 [0.487–0.862]
Maximum SOFA	1.242 [1.201–1.284]	1.163 [1.109–1.220]	<0.001
APACHE-II	1.089 [1.074–1.103]	1.025 [1.006–1.044]	0.008
Creatinine, mg/dL	1.150 [1.072–1.234]	0.876 [0.777–0.988]	0.031
Blood urea nitrogen, mg/dL	1.016 [1.011–1.021]
Aspartate transaminase, IU/L	1.000 [1.000–1.001]
Initial lactate level, mmol/L	1.211 [1.169–1.254]	1.163 [1.119–1.208]	<0.001
C-reactive protein, mg/dL	1.013 [1.004–1.022]
Procalcitonin, ng/mL	0.999 [0.997–1.001]

Logistic regression analysis with backward elimination method.

Abbreviations: OR, odds ratio; CI, confidence interval; SOFA, Sequential Organ Failure Assessment; APACHE, Acute Physiology and Chronic Health Evaluation.