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 | 751 | 1083 | 0.7 (0.4–1.0) |
Past smoking | 504 | 851 | 0.9 (0.6–1.3) |
RF-positive RA | |||
Current smoking | 452 | 1083 | 0.6 (0.3–1.0) |
Past smoking | 365 | 851 | 0.8 (0.6–1.3) |
RF-negative RA | |||
Current smoking | 299 | 1083 | 0.84 (0.5–1.5) |
Past smoking | 238 | 851 | 0.94 (0.6–1.5) |