Demographic and clinical characteristics of the National Data Bank for Rheumatic Diseases patients (n = 12,215).
| Variables | Values |
|---|---|
| Age, yrs | 59.1 (13.3) |
| Sex, female, % | 83.8 |
| College graduate, % | 39.7 |
| BMI | 29.5 (7.3) |
| Smoking category, % | |
| Never | 52.8 |
| Past | 35.8 |
| Current | 11.4 |
| Median household income (US$) | 55,000 |
| WPI (0–19) | 6.4 (5.6) |
| SSS (0–12) | 4.7 (3.0) |
| PSD (0–31) | 11.0 (7.6) |
| FM 2016, % | 26.4 |
| WSP, % | 51.7 |
| Generalized (widespread) pain, % | 42.1 |
| VAS pain (0–10) | 4.2 (2.8) |
| PCS (SF-36; 0–100) | 36.3 (11.0) |
| MCS (SF-36; 0–100) | 46.9 (12.1) |
| HAQ-DI (0–3) | 1.0 (0.7) |
| Work disability, % | 16.4 |
| EQ-5D (0–1) | 0.72 (0.20) |
| RA, % | 73.8 |
| NIRMD, % | 26.2 |
Values are mean (± SD) unless otherwise specified. HAQ-DI: Health Assessment Questionnaire–Disability Index; NIRMD: noninflammatory rheumatic and musculoskeletal disorders; BMI: body mass index; WPI: widespread pain index; SSS: symptom severity score; PSD: polysymptomatic distress scale; FM 2016: 2016 modified American College of Rheumatology criteria for fibromyalgia; WSP: widespread pain; VAS: visual analog scale; PCS: physical component score; MCS: mental component score; SF-36: Medical Outcomes Study Short Form-36; RA: rheumatoid arthritis.