Table 2.
INR and TTR distribution by country
| The Netherlands | Belgium | |
|---|---|---|
| N = 705 | N = 121 | |
| TTR INR method 1 a | 75.5 ± 14.9 | 48.7 ± 23.8 |
| ≥65 | 79.4% | 28.9% |
| TTR INR method 2 b | 55.4 ± 16.9 | 48.7 ± 23.8 |
| ≥65 | 28.2% | 28.9% |
| INR | 2.9 ± 1.0 | 2.4 ± 1.0 |
| <2.0 | 13.1% | 32.1% |
| <2.5 | 34.3% | 58.5% |
| 2.0‐3.0 | 51.9% | 48.2% |
| 2.5‐3.5 | 48.0% | 31.3% |
| 2.0‐3.5 | 69.2% | 57.7% |
| >3.0 | 35.0% | 19.7% |
| >3.5 | 17.7% | 10.2% |
Only cases with at least one INR measurement were analyzed. All INR measurements were treated independently. Categorical data is presented in % and continuous data in mean ± standard deviation.
Abbreviations: BE, Belgium; INR, international normalized ratio; NL, the Netherlands; TTR, time in therapeutic range.
a
Method 1: For BE TTR was calculated using an INR range of 2.0‐3.0 and for NL TTR was calculated using INR range of 2.0‐3.5 for INR values before 1 January 2016, and 2.0‐3.0 thereafter.
b
Method 2: For both countries TTR was calculated using INR range of 2.0‐3.0.