Average time in TTR among warfarin users
| Outcome variable | N | Mean | SD |
|---|---|---|---|
| Individual TTR | 1271 | 65.2 | 26.8 |
| Standard TTR | 1271 | 64.4 | 26.9 |
| Individual TTR, continuous use of warfarin | 474 | 72.3 | 19.9 |
| Standard TTR, continuous use of warfarin | 474 | 70.9 | 20.7 |
| Individual TTR, continuous use of warfarin and 1-year follow-up | 420 | 74.5 | 17.8 |
| Standard TTR, continuous use of warfarin and 1-year follow-up | 420 | 72.8 | 19.0 |
Individual TTR calculated on the basis of individually specified target INR range when available and on the basis of assumed 2.0–3.0 target range when individually specified target ranges were not defined. Standard TTR calculated on the basis of assumed 2.0–3.0 target INR range for all warfarin users. Continuous use, no gaps exceeding 56 days between two successive INR test results.
INR, international normalised ratio; TTR, time in therapeutic range.