Table 3: Inpatient cohort (n = 3598) with Elixhauser Comorbidity Index adjustment using anticoagulation as a time-dependent covariate

Outcome	HR (95% CI)*
All stroke and death	0.61 (0.55-0.67)
Ischemic stroke	0.84 (0.64-1.11)
Hemorrhagic stroke	2.18 (0.97-4.89)
All stroke	0.95 (0.73-1.23)
Death	0.57 (0.52-0.64)

Note: CI = confidence interval, HR = hazard ratio.*Adjusted for sex and CHADS2 (congestive heart failure, hypertension, age ≥ 75 yr, diabetes mellitus and prior stroke or transient ischemic attack) score.