Table 2 Versions of the Spine Functional Index Questionnaire tested

1. I stay at home most of the time

Yes

Not

2. I change position frequently for comfort.

Yes

Not

3. I avoid heavy jobs (e.g., cleaning, lifting more than 5kg or 10lbs, gardening, etc.).

Yes

Yes

4. I rest more often.

Yes

Not

5. I get others to do things for me.

Yes

Not

6. I have the pain/problem almost all the time.

Yes

Yes

7. I have difficulty lifting and carrying (e.g., bags, shopping up to 5kg or 10lbs).

Yes

Not

8. My appetite is now different.

Yes

Not

9. My walking or normal recreation or sporting activity is affected.

Yes

Not

10. I have difficulty with normal home or family duties and chores.

Yes

Yes

11. I sleep less well.

Yes

Yes

12. I need assistance with personal care (e.g., washing and hygiene).

Yes

Yes

13. My regular daily activities (work, social contacts) are affected.

Yes

Yes

14. I am more irritable and/or bad tempered.

Yes

Not

15. I feel weaker and/or stiffer.

Yes

Not

16. My transport independence is affected (driving, public transport).

Yes

Not

17. I require assistance or am slower with dressing.

Yes

Yes

18. I have difficulty moving in bed.

Yes

Not

19. I have difficulty concentrating and/or reading.

Yes

Not

20. My sitting is affected.

Yes

Yes

21. I have difficulty getting in and out of chairs.

Yes

Not

22. I only stand for short periods of time.

Yes

Yes

23. I have difficulty squatting and/or kneeling down.

Yes

Not

24. I have trouble reaching down (e.g., pick-up things, put on socks).

Yes

Yes

25. I go up stairs slower or use a rail.

Yes

Not