Demographic and baseline clinical data on patients included in the Norwegian longitudinal analyses (EURIDISS cohort), grouped by APOE genotype.

sd; standard deviation, Disease duration; disease duration at baseline in years, ACPA; anti-citrullinated protein antibodies, RF; rheumatoid factor, CRP; C-reactive protein (mg/L), ESR; erythrocyte sedimentation rate (mm/hour), HAQ; Health Assessment Questionnaire, LnSHS; log transformed Sharp van der Heijde score, sDMARD; synthetic disease-modifying anti rheumatic drugs.
*The three genotype groups (ε2 carriers, ε3/ε3, and ε4 carriers) were compared by ANOVA or Chi-square test.
£For RF and ACPA, patients were viewed as positive if they had at least one positive test during the 10 year follow-up.