Multivariate regression analysis: risk of dsDNA seropositivity in white patients with SLE
| Variable | OR (95% CI) |
|---|---|
| *Age refers to age at SLE diagnosis. | |
| Sex (male versus female) | 2.2 (1.0 to 4.7) |
| Each decade increase in age* | 0.7 (0.6 to 0.9) |
| Former versus never smoker | 1.4 (0.8 to 2.4) |
| Current versus never smoker | 4.0 (1.6 to 10.4) |
| Each additional pack-year | 1.0 (1.0 to 1.01) |