Table 1.

Comparison of baseline data (n/χ ± S)

Group	Male/female	Age (years)	Body mass index (kg/m2)	Oxygenation index	APACHE II score	Primary disease
						Acute pancreatitis/pulmonary infection/severe infection/trauma/other
Control group (n=50)	27/23	45.2±8.2	22.95±2.68	145.26±10.29	26.13±2.25	12/10/14/12/2
Study group (n=50)	26/24	45.9±7.6	23.15±3.02	146.35±9.95	26.38±2.37	14/9/13/10/4
χ2/t	0.040	0.443	0.350	0.341	0.541	0.244
P	0.841	0.659	0.727	0.734	0.590	0.970