Comparison between patients older and younger than 23 years in the 67 phone responder patients
| ⩽ 23 years (n=46) | > 23 years (n=21) | p Value | |
| Physical health | 64 (20) | 51 (22) | 0.02 |
| Mental health | 72 (21) | 62 (22) | 0.05 |
| General health | 69 (15) | 59 (18) | 0.02 |
| Perceived health | 85 (30) | 60 (34) | 0.003 |
| Anxiety | 35 (19) | 44 (18) | 0.08 |
| Pain | 18 (29) | 41 (37) | 0.03 |
Values are mean (SD) Duke score.