Table 1 Example search strategy

1. randomized controlled trial.pt.

16. coccydynia.ti,ab.

2. controlled clinical trial.pt.

17. sciatica.ti,ab.

3. randomized.ab.

18. sciatic neuropathy

4. placebo.ab,ti.

19. spondylosis.ti,ab.

5. randomly.ti.ab.

20. lumbago.ti,ab.

6. trial.ab,ti.

21. low back pain.ti,ab.

7. groups.ab,ti.

22. lumbopelvic pain.ti,ab.

8. or/1-7

23. or/11-22

9. (animals not (humans and animals)).sh.

24. 10 and 23

10. 8 not 9

25. osteopathic medicine.mh.

11. dorsalgia.ti,ab.

26. manipulation, osteopathic.mh

12. back Pain. ti,ab

27. OMT.ti,ab.

13. backache.ti,ab.

28. or/25-27

14. (lumbar adj pain).ti,ab.

29. 24 and 28

15. coccyx.ti,ab.