From: Smoking–gender interaction and risk for rheumatoid arthritis
Number of observations entering the multivariable model | |||
---|---|---|---|
Parameter | RA cases | Controls | Odds ratio* (95% CI) |
All RA | |||
Current smoking | 306 | 418 | 1.2 (0.7–2.0) |
Past smoking | 234 | 306 | 2.0 (1.2–3.2) |
RF-positive RA | |||
Current smoking | 181 | 418 | 1.5 (0.8–2.6) |
Past smoking | 140 | 306 | 2.3 (1.3–3.9) |
RF-negative RA | |||
Current smoking | 125 | 418 | 0.8 (0.3–1.8) |
Past smoking | 94 | 306 | 1.5 (0.7–3.0) |