|
| Total | Type 1 | Type 2 | Type 3 | Type 4 |
| Number of patients | 53 (100%) | 9 (17%) | 33 (62%) | 9 (17%) | 2 (4%) |
| Back pain prior to surgery | 34 (64%) | 5 (55%) | 22 (67%) | 6 (67%) | 1 (50%) |
| Mean age (range) | 18.1 (12 - 24) | 18.6 (15 - 24) | 18.7 (12 - 23) | 18.2 (14 - 22) | 17 (16 - 18) |
| Op level L3 - 4 | 1 (2%) | 0 (0%) | 1 (3%) | 0 (0%) | 0 (0%) |
| Op level L4 - 5 | 25 (47%) | 3 (33%) | 17 (51%) | 3 (33%) | 2 (100%) |
| Op level L5 - S1 | 22 (42%) | 6 (67%) | 13 (39%) | 3 (33%) | 0 (0%) |
| Op level L4 - L5 - S1 | 5 (9%) | 0 (0%) | 2 (6%) | 3 (33%) | 0 (0%) |
| Sport participation | 26 (49%) | 5 (56%) | 18 (55%) | 3 (33%) | 0 (0%) |