Adjusted2-150 odds ratio (with 95% confidence interval (CI)) of rheumatoid factor (RF) positivity (sensitised sheep cell agglutination titre ⩾128) for different factors
↵2-150 All variables in the table were included in the logistic regression model.
2-151 Likelihood ratio test for linear trend (continuous variables) or for heterogeneity (groups of categorised variables).
2-152 LDL cholesterol = low density lipoprotein cholesterol.