The association between longstanding or recent onset rheumatoid arthritis and 4-year incidence of cancer.

Values are odds ratios and p-values from multivariable logistic regression analyses for the development of lymphoproliferative cancer and solid tumors for the risk groups: No previous rheumatoid arthritis, Longstanding rheumatoid arthritis, and Recent onset rheumatoid arthritis. Odds ratios are adjusted in a stepwise manner: [1] sex, age (quadratic), year and month; [2] previous and present eosinophilia; [3] Charlson's Comorbidity Index, and [4] C-reactive protein. ^†P-value for the likelihood-ratio test of all categories of eosinophilia simultaneously. * Hodgkin's lymphoma, non-Hodgkin lymphoma and chronic lymphocytic leukemia.