Time | 6 mon | 12 mon | 18 mon | 24 mon |
Low risk | 75% (3/4) | 100% (4/4) | 100% (4/4) | 100% (4/4) |
Intermediate/High risk | 44% (11/25) | 83.3% (20/25) | 73.3% (11/15) | 86.7% (13/15) |
P | 0.249 | 0.378 | 0.245 | 0.44 |