Characteristics of the 17% of patients who withdrew at 1 year versus patients who continued.
| Continued | Withdrew | p | |
|---|---|---|---|
| Female, % | 72.4 | 70.7 | 0.5 |
| Meet RA 2010 criteria, % | 80.1 | 63.7 | < 0.0001 |
| Income, %, $Canadian | 0.022 | ||
| None | 4.0 | 7.2 | |
| < $20,000 | 15.7 | 22.0 | |
| $20,000–$50,000 | 36.4 | 34.5 | |
| $50,000–$100,000 | 29.4 | 23.3 | |
| > $100,000 | 14.5 | 13.0 | |
| Education, % | 0.8 | ||
| Elementary school | 8.2 | 9.6 | |
| High school | 34.9 | 32.4 | |
| College/trade school | 30.5 | 31.0 | |
| University/bachelor | 18.1 | 19.2 | |
| Masters | 3.2 | 3.7 | |
| PhD | 1.0 | 0.3 | |
| Other | 4.3 | 3.9 | |
| Ethnicity, % | |||
| White | 83.3 | 76.6 | 0.07 |
| Smoking status, % | < 0.0001 | ||
| Never | 43.1 | 51.4 | |
| Current smoker | 17.9 | 21.6 | |
| Ex-smoker | 39.0 | 27.0 | |
| RF+ | 60.9 | 40.8 | < 0.0001 |
| Anti-CCP+, % | 58.4 | 41.2 | < 0.0001 |
| Age, mean ± SD | 53.4 ± 14.9 | 50.3 ± 17.7 | 0.0016 |
| Disease duration, mean days ± SD | 182.9 ± 109.6 | 189.8 ± 131.6 | 0.3 |
| DAS28, mean ± SD | 4.9 ± 1.5 | 4.8 ± 1.5 | 0.1 |
| Tender joint count 28, mean ± SD | 8.0 ± 6.5 | 8.3 ± 7.1 | 0.35 |
| Swollen joint count 28, mean ± SD | 7.2 ± 6.0 | 6.6 ± 6.3 | 0.057 |
| ESR, mean ± SD | 27.1 ± 22.7 | 25.2 ± 24.3 | 0.16 |
| PtGA, mean ± SD | 5.7 ± 3.0 | 5.7 ± 2.9 | 0.7 |