Baseline (N = 906)

6 month (N = 273)

12 month (N = 180)

Duration of pain (years), (mean [SD])

8.1 (10.8)

7.3 (10.8)

9.1 (11.7)

Pain intensity

7.1 (2.0)

5.5 (2.2)

5.4 (2.3)

Temporal statements

2.2 (0.9)

2.6 (1.2)

2.6 (1.2)

PSEQ

19.7 (13.4)

26.0 (14.5)

24.7 (14.8)

DASS subscales

Depression

16.9 (12.6)

14.7 (11.7)

15.8 (11.9)

Anxiety

12.1 (10.6)

12.1 (10.3)

12.1 (9.9)

Stress

17.8 (12.0)

15.9 (11.2)

16.7 (11.8)

SF-36 subscales

General health

39.7 (22.6)

40.3 (23.5)

36.9 (22.0)

Bodily pain

29.5 (18.8)

37.1 (19.5)

39.2 (21.0)

Physical function

34.6 (25.1)

38.8 (26.5)

34.8 (25.6)

Social function

38.5 (27.4)

45.8 (26.8)

45.3 (30.2)

Role emotional

40.4 (43.2)

47.8 (44.6)

46.9 (42.8)

Role physical

16.8 (30.7)

27.4 (35.8)

24.0 (34.9)

Vitality

29.5 (15.8)

35.3 (16.6)

32.3 (14.8)

Mental health

51.5 (21.1)

56.7 (20.1)

54.1(20.3)