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. 2005 Sep 8;65(5):581–584. doi: 10.1136/ard.2005.039438

Table 3 Multivariate regression analysis: risk of dsDNA seropositivity in white patients with SLE.

Variable OR (95% CI)
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)

*Age refers to age at SLE diagnosis.