| 1. Good self-prognosis on work ability in 2 years |
9. Multifocal complaints |
17. Subgroup thoracic spine |
| 2. Mental disorder |
10. White collar worker |
18. Primary therapy passive |
| 3. Impairment prior to treatment |
11. Analgesics intake |
19. Genitourinary or digestive disease |
| 4. Rheumatoid arthritis |
12. Neurological-sensory disease |
20. Tumours |
| 5. Mental resources |
13. Employed |
21. Smoker |
| 6. Duration of complaints ≥½ year |
14. Pain radiation lower extremity |
22. Diabetes or metabolic disease |
| 7. Pain intensity at t1 |
15. Physically active |
23. Subgroup low back non-specific |
| 8. Age |
16. Body mass index |
24. Primary therapy active |
