Table 2. Multivariate Cox proportional hazards model (all patients, n  = 127) .

	Hazard ratio	Confidence interval	Significance
Ever smoker	1.86	1.25–2.8	0.002
CKD grade 3 or above	0.70	0.46–1.05	0.085
ICU stay	0.92	0.60–1.43	0.738
Prophylactic anticoagulation a	0.29	0.15–0.58	<0.001
Therapeutic anticoagulation a	0.15	0.07–0.32	<0.001
CS treatment duration (day)	0.89 b	0.84–0.93	<0.001

Abbreviations: CKD, chronic kidney disease; CS, corticosteroid; ICU, intensive care unit.

^aCompared with No anticoagulation.

^bPer 1-day increase.