Skip to main content

Table 2 Adjusted odds ratios for developing rheumatoid arthritis according to smoking and rheumatoid factor status in women

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)

  1. *Odds ratios are expressed as the expected probability of having rheumatoid arthritis (RA) as compared with those who did not smoke. The confounders adjusted for in the multivariable logistic regression models included age, body mass index, number of years of education, Health Assessment Questionnaire disability index, general health assessment, and pain. CI, confidence interval.