| CAU | CM | P value | |||||
| Total | withdraw | Percent | Total | withdraw | Percent | ||
| Baseline | 60 | 0 | 0.00% | 68 | 0 | 0.00% | |
| 1 month | 53 | 7 | 13.21% | 67 | 1 | 1.49% | 0.03 |
| 3 month | 51 | 9 | 17.65% | 64 | 4 | 6.25% | 0.08 |
| 6 month | 48 | 12 | 25.00% | 62 | 6 | 9.68% | 0.07 |
| 12 month | 44 | 16 | 36.36% | 62 | 6 | 9.68% | 0.01 |