Time | 6 mon | 12 mon | 18 mon | 24 mon |
Low risk | 38.9% (7/18) | 50% (9/18) | 62.5% (10/16) | 75% (12/16) |
Intermediate/High risk | 13.5% (5/37) | 19.4% (7/36) | 27.3% (9/33) | 30.3% (10/33) |
P | 0.033 | 0.02 | 0.018 | 0.003 |