Fig. 1From: The association between smoking and knee osteoarthritis in a cohort of Danish patients undergoing knee arthroscopyAssociation between smoking and early or more established knee OA. *Crude: logistic regression with estimation of risk ratio (RR) and 95% CI. Model 1: logistic regression with RR and 95% CI, adjusted for age, sex and BMI. Model 2: logistic regression with RR and 95% CI, adjusted for age, sex, BMI, highest completed level of education, work status and the level of leisure time physical activityBack to article page