| Baseline | 6 month | 6 month change | 12 month | 12 month change | 18 month | 18 month change | 24 month | 24 month change | |
| All participants | 10.1 | 8.0 | -2.1 | 7.3 | -2.8 | 8.0 | -2.1 | 6.7 | -3.3 |
| Type 1 | 10.2 | 8.4 | -1.8 | 7.5 | -2.7 | 8.1 | -2.1 | 8.0 | -2.2 |
| Type 2 | 9.9 | 6.8 | -3.1 | 5.5 | -4.4 | 6.0 | -3.9 | 5.0 | -4.9 |
| Pre | 10.2 | 6.8 | -3.4 | 7.8 | -2.4 | 8.8 | -1.4 | 5.8 | -4.4 |