Fibromyalgia (FM)-related characteristics according to entry and diagnostic criteria. FM+ and FM− refer to clinical diagnosis at time of databank entry. Criteria+ and Criteria− refer to results of the modified ACR 2010 diagnostic criteria.
| Variable | FM (+), Criteria+, mean or % | FM+, Criteria−, mean or % | FM−, Criteria+, mean or % | FM−, Criteria−, mean or % |
|---|---|---|---|---|
| Widespread pain index (0–19) | 12.9 | 5.6 | 11.7 | 3.6 |
| 4-item modified SS score (0–12) | 8.0 | 4.0 | 7.4 | 2.8 |
| Fibromyalgia symptom scale (0–31) | 20.9 | 9.6 | 19.0 | 6.5 |
| Fatigue (0–10) | 7.2 | 4.2 | 7.1 | 3.1 |
| Sleep disturbance (0–10) | 6.5 | 3.8 | 6.1 | 3.0 |
| VAS pain (0–10) | 6.3 | 3.8 | 5.9 | 2.7 |
| Mood (0–10) | 4.0 | 2.6 | 3.8 | 2.0 |
| Muscle tenderness (%) | 89.7 | 63.0 | 65.7 | 18.6 |
| Symptom count (0–37) | 16.1 | 8.8 | 14.5 | 5.7 |
ACR: American College of Rheumatology; SS: symptom severity scale; VAS: visual analog scale.