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Rate ratio of injurious motor vehicle crash associated with exposure to warfarin (any use) in the month before the index date
| Drug (time period examined) | Cases(N = 5579) | Controls(N = 12 911) | Crude rate ratio | Adjusted rate ratio | 95% CI |
|---|---|---|---|---|---|
| Unexposed | 5556 | 12775 | Reference | Reference | Reference |
| Warfarin (30 days) | 23 | 82 | 0.65 | 0.58 | 0.36, 0.93 |
| Warfarin (1 year, not last 30 days) | 26 | 56 | 1.03 | 0.98 | 0.60, 1.59 |
