Compliance with exercise treatment and its effect on the residual effect of exercise (results week 36 compared with week 12), as assessed by pain in the past week and observed disability
| Yes | No | p Value | |
| Compliance according to the patient (n) | 61 | 28 | |
| Pain in past week: stable or improved (%) | 54.1 | 46.4 | 0.50 |
| Observed disability: stable or improved (%) | 45.9 | 40.0 | 0.62 |
| Compliance according to the physiotherapist (n) | 73 | 11 | |
| Pain in past week: stable or improved (%) | 56.2 | 27.3 | 0.07 |
| Observed disability: stable or improved (%) | 46.6 | 22.2 | 0.17 |