Table 2.

Among current smokers at the beginning of the peri-RA/index period, frequencies for smoking behavior changes and odds ratio for sustained smoking cessation.

	Current – continue	Current – quit	Current then variable smoking*	Age- and year-adjusted OR (95% CI) for sustained cessation among current smokers	Multivariable adjusted OR (95% CI) for sustained cessation among current smokers**
Comparison cohort (n=1,987)	460 (23.2%)	717 (36.1%)	810 (40.8%)	1.00 (Ref)	1.00 (Ref)
RA cohort (n=225)	41 (18.2%)	90 (40.0%)	94 (41.8%)	1.21 (0.91–1.61)	1.18 (0.88–1.58)

Each RA case was matched with up to 10 women without RA on age and calendar year at index date to form the comparison cohort.

^*“Current then variable smoking” includes current smokers at RA diagnosis/index date then quit >4 years after RA diagnosis/index date, quit at RA diagnosis/index date then later started smoking again, or quit/relapsed smoking.

^**Adjusted for age (years), questionnaire period, BMI category (underweight, normal, overweight, obese), physical activity (hours of moderate or vigorous exercise per week, continuous), census-tract household family income (<$40K, $40K+ per year), Alternative Healthy Eating Index score (tertiles), and Multimorbidity Weighted index (continuous).

CI, confidence interval; OR, odds ratio; RA, rheumatoid arthritis.