Table 2.

Risk factors of mortality in severe acute respiratory syndrome (SARS) by univariate analysis

	Relative risk (99% CI)	P value
Use of inotropes	15.77 (7.539–32.99)	<0.001
Acute renal impairment	16.91 (8.368–34.16)	<0.001
Acute respiratory distress syndrome	10.28 (4.854–21.77)	<0.001
Systolic blood pressure	1.014 (0.997–1.031)	0.032
White blood cells	1.066 (0.988–1.150)	0.029
Lymphocyte count	0.529 (0.209–1.339)	0.077
Nadir white blood cells	1.160 (1.057–1.272)	<0.001
Nadir lymphocyte count	0.016 (0.001–0.217)	<0.001
Plasma albumin on admission	0.890 (0.841–0.942)	<0.001
Peak plasma creatine phosphokinase > 1500a	6.689 (1.699–26.34)	<0.001
Plasma alanine aminotransferase on admission	1.005 (1.001–1.009)	0.004
Age	1.049 (1.029–1.068)	<0.001

^aPatients with creatine phosphokinase less than 1500 serve as the reference group.