Table 4.

Results of Logistic Regression for Case Fatality Based on the Data of 152 Critical SARS Cases^*

							95% CI for Odds Ratio
Variables	β	SE	Wald	df	Significance	Odds Ratio	Lower	Upper
Steroid use	− 2.488	1.247	3.983	1	0.046	0.083	0.007	0.956
Age, yr	0.072	0.033	4.710	1	0.030	1.074	1.007	1.146
Rigor at onset	1.864	0.897	4.316	1	0.038	6.446	1.112	37.402
Secondary respiratory infection	4.517	1.149	15.467	1	0.000	91.588	9.648	870.321
Pulmonary rales	0.929	0.413	5.065	1	0.024	2.531	1.128	5.684
OI grading	− 1.734	0.599	8.384	1	0.004	0.177	0.055	0.571
Constant	− 3.788	2.289	2.738	1	0.098	0.023

^*df = degree of freedom.