Multivariable importance of variables using patients’ global assessment of illness severity as dependent variable. Metrics are normalized to sum to 100% of cognitive impairment through widespread pain index. Data are percentages.
| Item | RA (N = 5884) | RA FM+ (N = 1233) | RA FM− (N = 4651) | FM All (N = 808) | FM Criteria (+) (N = 466) |
|---|---|---|---|---|---|
| Cognitive impairment | 3.8 | 0.6 | 2.1 | 7.0 | 3.8 |
| Fatigue | 17.8 | 16.2 | 19.5 | 20.7 | 20.5 |
| HAQ disability | 15.2 | 17.4 | 17.0 | 11.4 | 14.5 |
| Mood | 6.4 | 10.7 | 5.0 | 7.0 | 5.7 |
| Pain | 25.4 | 32.4 | 30.9 | 24.4 | 29.2 |
| Sleep | 10.6 | 7.5 | 11.2 | 11.0 | 11.0 |
| Stiffness | 7.2 | 7.5 | 6.3 | 6.5 | 7.5 |
| Symptom count | 6.5 | 3.5 | 4.2 | 6.1 | 2.8 |
| Widespread pain index | 7.2 | 4.1 | 3.8 | 5.8 | 4.9 |
| Explained variance | 65.2 | 43.9 | 58.1 | 58.0 | 39.9 |
| Maximum explained variance* | 68.0 | 46.5 | 61.2 | 61.0 | 44.6 |
↵* Separate model that includes above variables plus SF-36 physical component summary. HAQ: Health Assessment Questionnaire.