Characteristics of study participants. Values are % or mean ± SD unless otherwise specified.
| Variables | FM | RA | Population* |
|---|---|---|---|
| No. subjects | 1525 | 12,037 | 2445 |
| Age, yrs | 56.9 ± 12.8 | 60.5 ± 13.5 | 50.2 ± 17.4 |
| Female sex | 95.3 | 82.0 | 53.5 |
| Clinical referral FM diagnosis | 100 | NA | NA |
| 2016 criteria FM diagnosis | 52.9 | 22.3 | 2.0 |
| PSD score | |||
| All subjects | 16.5 ± 7.4 | 10.0 ± 7.5 | 3.0 ± 3.6 |
| FM+ subjects | 21.9 | 20.7 | NA |
| ≤ 3 | 2.8 | 20.8 | 68.5 |
| ≥ 4 and ≤ 11 | 24.3 | 45.3 | 28.1 |
| Correctly classified as FM by PSD at optimum PSD score | 88.9 | 92.7 | 98.9 |
↵* 2013 population study in German general population9. FM: fibromyalgia; RA: rheumatoid arthritis; PSD: polysymptomatic distress; NA: not available.