Table 3

Adjusted odds ratios (OR)^3-150 for the effects of cumulative smoking on RA disease severity

Smoking status (versus never smoker)		OR (95% CI)
Smoking status (versus never smoker)		Rheumatoid^† factor positive	Radiographic^‡erosions	Rheumatoid nodules
Never smoked		1.00 (referent)	1.00 (referent)	1.00 (referent)
Smoking (pack years):	>0–25	2.39 (1.36,4.20)	1.10 (0.62,1.47)	1.65 (0.93,2.92)
	≥25	3.06 (1.67,5.59)	2.37 (1.23,4.56)	1.25 (0.70,2.22)

↵3-150 Adjusted for age, sex, body mass index, education level, marital status, companionship, and/or income level (if relevant based on univariate associations). ^†c statistic=0.668, goodness of fit statistic p=0.437. ^‡c statistic=0.624, goodness of fit statistic p=0.964.