Characteristics | ALL (N = 121) | INTV (n = 60) | CTRL (n = 61) |
Female, n (%) | 106 (87.6%) | 53 (88.3%) | 53 (86.9%) |
Age years, mean (SD), | 52.7 (11.7) | 52.1 (11.4) | 53.3 (12.1) |
(range) | (23–74) | (27–71) | (23–74) |
Living with someone, n (%) | 86 (71.1%) | 43 (71.7%) | 43 (70.5%) |
Highest level of education, n (%) | |||
 lower secondary school or less | 8 (6.6%) | 4 (6.7%) | 4 (6.6%) |
 upper secondary school | 56 (46.3%) | 28 (46.7%) | 28 (45.9%) |
 higher education (college or university) | 57 (47.1%) | 28 (46.7%) | 29 (47.5%) |
Main reason for pain, n (%): | |||
 musculoskeletal diseases, ICPC-2 chapter L | 93 (76.9%) | 46 (76.7%) | 47 (77.0%) |
 neuro system diseases, ICPC-2 chapter N | 16 (13.2%) | 10 (16.7%) | 6 (9.8%) |
 general and unspecified, ICPC-2 chapter A | 12 (9.9%) | 4 (6.7%) | 8 (13.1%) |
Pain duration, n (%) | |||
 7–11 months | 2 (1.7%) | 2 (3.3%) | 0 (0%) |
 1–5 years | 24 (19.8%) | 12 (20.0%) | 12 (19.7%) |
 6–9 years | 19 (15.7%) | 11 (18.3%) | 8 (13.1%) |
 10 years or more | 76 (62.8%) | 35 (58.3%) | 41 (67.2%) |
More than one chronic condition, n (%) | 76 (62.8%) | 32 (53.3%) | 44 (72.1%) |
Work status, n (%) | |||
 working, full or part time | 31 (25.6%) | 13 (21.7%) | 18 (29.5%) |
 disability pension, full or graded | 56 (46.3%) | 33 (55%) | 23 (37.7%) |
 sick leave, full or graded | 20 (16.5%) | 8 (13.3%) | 12 (19.7%) |
 retired | 14 (11.6%) | 6 (10.0%) | 8 (13.1%) |
Pain medication, n (%): | |||
 prescription-only | 51 (42.1%) | 23 (38.3%) | 28 (45.9%) |
 without prescription | 41 (33.9%) | 19 (31.7%) | 22 (36.1%) |
 do not use pain medication | 29 (24.0%) | 18 (30.0%) | 11 (18.0%) |
Healthcare utilization, last 3 months: | |||
 visits general practitioner, mean (SD) | 1.9 (1.9) | 1.6 (1.7) | 2.1 (2.0) |
 visits physiotherapist, mean (SD) | 4.8 (6.3) | 4.5 (5.9) | 5.1 (6.8) |
 stays rehabilitation centre, mean (SD) | 0.07 (0.3) | 0.1 (0.3) | 0.05 (0.2) |
 visits hospital outpatient clinic, mean (SD) | 0.6 (1.1) | 0.5 (0.9) | 0.6 (1.3) |
 admission hospital, mean (SD) | 0.1 (0.7) | 0.2 (1.0) | 0.02 (0.1) |
  number of days, mean (SD), (range) | 0.1 (0.8) (0–8) | 0.2 (1.2) (0–8) | 0.02 (0.1) (0–1) |
PAM-13 level at baseline | N = 119 | n = 58 | n = 61 |
 Level 1 | 16 (13.4%) | 9 (15.5%) | 7 (11.5%) |
 Level 2 | 12 (10.1%) | 3 (5.2%) | 9 (14.8%) |
 Level 3 | 61 (51.3%) | 32 (55.2%) | 29 (47.5%) |
 Level 4 | 30 (25.2%) | 14 (24.1%) | 16 (26.2%) |