Table 2.
Measures of anticoagulation control among the overall population and in patients aged ≥80 and < 80 years.
| N (%) | Total, N = 991 | Age ≥80, N = 205 | Age <80, N = 786 | p value |
|---|---|---|---|---|
| Mean TTR (SD) | 66.6 (13.2) | 66.6 (13.8) | 66.6 (13.1) | 1.00 |
| TTR <70% | 550 (55.5) | 114 (55.6) | 436 (55.5) | 1.00 |
| TTR ≥70% | 441 (44.5) | 91 (44.4) | 350 (44.5) | |
| Mean PINRR (SD) | 57.6 (11.2) | 57.1 (11.6) | 57.7 (11.1) | 0.54 |
| PINRR <70% | 851 (85.9) | 176 (85.9) | 675 (85.9) | 1.00 |
| PINRR ≥70% | 140 (14.1) | 29 (14.1) | 111 (14.1) | |
| Mean (SD) number of visits | 58.7 (25.5) | 51.2 (22.7) | 60.7 (25.8) | <0.001 |
| Mean (SD) percentage of INRs <2 | 25.7 (10.0) | 26.6 (9.8) | 25.5 (24.5) | 0.17 |
| Mean (SD) percentage of INRs >3 | 16.6 (7.2) | 16.4 (15.6) | 16.7 (7.1) | 0.60 |
| INR >5 | 293 (29.6) | 70 (34.1) | 223 (28.4) | 0.13 |
| INR >8 | 41 (4.1) | 10 (4.9) | 31 (3.9) | 0.69 |
| Median (IQR) years of follow-up | 5.2 (3.2–7.0) | 4.4 (2.6–6.2) | 5.7 (3.3–7.1) | <0.001 |
INR: International Normalised Ratio; IQR: interquartile range; PINRR: percentage of INRs within range; SD: standard deviation; TTR: time in therapeutic range.