| n | mean (SD) or % | Cronbach’s alpha |
---|---|---|---|
Age in years, mean (SD) | 351 | 50.9 (7.9) | Â |
Educational level | 351 | Â | Â |
 % low |  | 18.0 |  |
 % high |  | 82.1 |  |
ICD-10 diagnosis | 351 | Â | Â |
 % M40–M54 |  | 84.6 |  |
 % M00–M25 |  | 10.5 |  |
 % other |  | 4.8 |  |
Children | 351 | Â | Â |
 % at least one child ≤12 years |  | 8.0 |  |
 % all children >12 years |  | 71.8 |  |
 % none |  | 20.2 |  |
Employment | 337 | Â | Â |
 % full-time |  | 73.3 |  |
 % part-time |  | 26.7 |  |
Time-based WIF (5–20 points), mean (SD) | 351 | 9.6 (2.9) | 0.86 |
Strain-based WIF (6–25 points), mean (SD) | 351 | 13.2 (3.1) | 0.81 |
Time-based FIW (5–20 points), mean (SD) | 351 | 7.1 (2.0) | 0.68 |
Strain-based FIW (6–25 points), mean (SD) | 351 | 9.3 (2.5) | 0.83 |
Work Ability Index (7–49 points), mean (SD) | 336 | 28.2 (7.7) | 0.78 |
 % poor (7–27 points) |  | 42.9 |  |
 % moderate (28–36 points) |  | 43.8 |  |
 % good/excellent (37–49 points) |  | 13.4 |  |