Table 1

‚ÄÉResults of univariate analysis of smoking, shared epitope positivity, and glutathione S-transferase M1 (GSTM1) null homozygosity and RA risk

ExposurePatients with RAControlsOR (95% CI)*
No (%)No (%)
*Odds ratios (OR) and 95% confidence intervals (CIs) describe univariate associations between each of the exposures and RA risk.
Tobacco smoke, ever48 (41.7)159 (34.1)1.38 (0.91 to 2.10)
Tobacco smoke, current22 (24.7)59 (16.1)1.71 (0.98 to 2.98)
Shared epitope positive63 (60.6)109 (45.8)1.82 (1.14 to 2.91)
GSTM1 null homozygosity58 (54.2)200 (43.2)1.56 (1.02 to 2.37)