Table 2.

Multivariable cox regression for associations between different corticosteroids groups and overall mortality risks

	No. of subjects	No. of events	Model 1a			Model 2b			Model 3c
			HR	95 % CI	P	HR	95 % CI	P	HR	95 % CI	P
Group A	126	54	1(Reference)			1(Reference)			1(Reference)
Group B	44	28	1.4	0.88–2.4	0.15	1.4	0.87–2.4	0.16	1.5	0.92–2.6	0.099
Group C	40	17	0.50	0.27–0.91	0.024	0.54	0.30–0.97	0.041	0.49	0.26–0.91	0.024

^aModel 1: age, sex, baseline respiratory support modes, body mass index (BMI), interstitial lung disease, lymphocytes, platelet, history of corticosteroids using, and intervals between symptoms onset and initiation of corticosteroids therapy.

^bModel 2: age, sex, baseline respiratory support modes, body mass index (BMI), hyperlipidemia, chronic kidney disease, intervals between symptoms onset and initiation of corticosteroids therapy, immunomodulators, and anticoagulation.

^cModel 3: all covariates in Model 1 and Model 2.