Table 1.
Patient and disease characteristics.
| Variable | |
|---|---|
| Patient characteristics | |
| n | 2.491 |
| Age, years | 63.1 ± 13.1 (64.6) |
| Females, % | 79% |
| BMI (Kg/m2), (n=2.045) | |
| Underweight (<18.5) | 1% |
| Normal (18.5–24.9) | 30% |
| Overweight (25–29.9) | 42% |
| Obese (>30) | 26% |
| Smoking habits, % (n=2.395) | |
| No history of smoking | 65% |
| Active smokers | 19% |
| Past smokers | 16% |
| Alcohol use, % (n=2.408) | |
| No active drinking | 67% |
| ≤ 1 time/month | 16% |
| 2–4 times/month | 11% |
| 2–3 times/week | 4% |
| ≥ 4 times/week | 2% |
| Educational status, % (n=2.035) | |
| Preliminary school graduate | 46% |
| High school graduate | 37% |
| University or higher technical graduate | 17% |
| Working status, % (n=2.194) | |
| Employed | 28% |
| Retired | 53% |
| Unemployed | 19% |
| Disease characteristics | |
| Disease duration, years (n=2.236) | 9.9 ± 8.7 (7) |
| Early RA (< 2 years), n (%) (n=2.236) | 237 (11%) |
| RF and/or anti-CCP+, n (%) (n=2.342) | 1.214 (52%) |
| DAS28-ESR (n=2.126) | 3.4 ± 1.3 (3.1) |
| HAQ (n=2.075) | 0.48 ± 0.56 (0.25) |
| Joint erosions (X-rays, n=1.888) | 779 (41%) |
| History of joint arthroplasties (n=2.491) | 231 (9.3%) |
| RA-associated interstitial lung disease (n=2.364) | 127 (5.4%) |
Data are expressed as mean ± 1 Standard Deviation (median), unless otherwise specified.
In parenthesis the number of patients with available data from the whole cohort is also shown.
BMI, body mass index; RA, rheumatoid arthritis; DAS28-ESR, Disease Activity Score in 28 joints; ESR, erythrocyte sedimentation rate; RF, rheumatoid factor; Anti-CCP, anti-cyclic citrullinated peptide antibodies; HAQ, Health Assessment Questionnaire.