| Hughes scale at 4 weeks | Grade 1 | 3 (20.0%) | 0 (0.0%) | 15.733 | 0.003 | HS |
| Grade 2 | 8 (53.3%) | 0 (0.0%) | ||||
| Grade 3 | 4 (26.7%) | 1 (20.0%) | ||||
| Grade 4 | 0 (0.0%) | 3 (60.0%) | ||||
| Grade 6 | 0 (0.0%) | 1 (20.0%) | ||||
| | Grade 0 | 5 (33.3%) | 0 (0.0%) | 20.000 | 0.001 | HS |
| Grade 1 | 8 (53.3%) | 0 (0.0%) | ||||
| Grade 2 | 2 (13.3%) | 0 (0.0%) | ||||
| Grade 3 | 0 (0.0%) | 3 (60.0%) | ||||
| Grade 4 | 0 (0.0%) | 1 (20.0%) | ||||
| Grade 6 | 0 (0.0%) | 1 (20.0%) |