Baseline characteristics of patients with RA stratified by smoking status before treatment with tumor necrosis factor (TNF) antagonists.
| Never Smoked, n = 51 | Past Smoker, n = 65 | Current Smoker, n = 38 | |
|---|---|---|---|
| Age, mean (SD) yrs | 54.5 (12.3) | 57.7 (12.9) | 56.4 (12.60) |
| Age of RA onset, man (SD) yrs | 40.7 (14.1) | 42.6 (13.4) | 45.8 (11.4) |
| Disease duration, mean (SD) yrs* | 13.9 (8.4) | 15.2 (8.6) | 10.6 (8.3) |
| Male:female** | 8:43 | 26:39 | 10:28 |
| Rheumatoid factor, % | 66.0 | 73.5 | 83.3 |
| Nodules, % | 52.0 | 64.7 | 66.7 |
| Erosions, % | 92.0 | 91.2 | 97.4 |