Total duration (in days) of heparin therapy and durations of heparin therapy with APTT exceeding 4 different “therapeutic” thresholds among Olmsted County, MN residents with a first-lifetime VTE diagnosed in 1984-1997
| Statistic . | Total duration . | APTT, s . | |||
|---|---|---|---|---|---|
| ≥ 40* . | ≥ 58 . | ≥ 70 . | ≥ 90 . | ||
| Median | 6.00 | 4.80 | 3.84 | 2.09 | 0.76 |
| Mean | 6.60 | 5.24 | 4.14 | 2.37 | 1.13 |
| SD | 2.99 | 3.08 | 2.67 | 2.23 | 1.37 |
| ≥ 5 d | 76.4% | 45.6% | 33.3% | 11.1% | 1.9% |
| Statistic . | Total duration . | APTT, s . | |||
|---|---|---|---|---|---|
| ≥ 40* . | ≥ 58 . | ≥ 70 . | ≥ 90 . | ||
| Median | 6.00 | 4.80 | 3.84 | 2.09 | 0.76 |
| Mean | 6.60 | 5.24 | 4.14 | 2.37 | 1.13 |
| SD | 2.99 | 3.08 | 2.67 | 2.23 | 1.37 |
| ≥ 5 d | 76.4% | 45.6% | 33.3% | 11.1% | 1.9% |
APTT values of 40, 58, 70, and 90 s correspond to plasma heparin levels of 0.2, 0.3, 0.5, and 0.9 anti-Xa IU/mL, respectively.