BackgroundSustained DMARD-free remission (SDFR) is increasingly achievable. The pathogenesis underlying SDFR development is unknown and patient characteristics at diagnosis poorly explain whether... Show moreBackgroundSustained DMARD-free remission (SDFR) is increasingly achievable. The pathogenesis underlying SDFR development is unknown and patient characteristics at diagnosis poorly explain whether SDFR will be achieved. To increase the understanding, we studied the course of disease activity scores (DAS) over time in relation to SDFR development. Subsequently, we explored whether DAS course could be helpful identifying RA patients likely to achieve SDFR.Methods772 consecutive RA patients, promptly treated with csDMARDs (mostly methotrexate and treat-to-target treatment adjustments), were studied for SDFR development (absence of synovitis, persisting minimally 12 months after DMARD stop). The course of disease activity scores (DAS) was compared between RA patients with and without SDFR development within 7 years, using linear mixed models, stratified for ACPA. The relation between 4-month DAS and the probability of SDFR development was studied with logistic regression. Cumulative incidence of SDFR within DAS categories (<1.6, 1.6-2.4, 2.4-3.6, 3.6) at 4 months was visualized using Kaplan-Meier curves.ResultsIn ACPA-negative RA patients, those achieving SDFR showed a remarkably stronger DAS decline within the first 4 months, compared to RA patients without SDFR; -1.73units (95%CI, 1.28-2.18) versus -1.07units (95%CI, 0.90-1.23) (p <0.001). In APCA-positive RA patients, such an effect was not observed, yet SDFR prevalence in this group was low. In ACPA-negative RA, DAS decline in the first 4 months and absolute DAS levels at 4 months (DAS(4 months)) were equally predictive for SDFR development. Incidence of SDFR in ACPA-negative RA patients was high (70.2%) when DAS(4 months) was <1.6, whilst SDFR was rare (7.1%) when DAS(4 months) was >= 3.6.ConclusionsIn ACPA-negative RA, an early response to treatment, i.e., a strong DAS decline within the first 4 months, is associated with a higher probability of SDFR development. DAS values at 4 months could be useful for later decisions to stop DMARDs. Show less
This thesis describes the outcomes an possibilities of drug-tapering in rheumatoid arthritis (RA) patients treated to target. Data from the BeSt cohort were used, in which early RA patients were... Show moreThis thesis describes the outcomes an possibilities of drug-tapering in rheumatoid arthritis (RA) patients treated to target. Data from the BeSt cohort were used, in which early RA patients were randomized to 4 treatment arms: initial monotherapy, sequential or step-up, or initial combination therapy, with prednisone or TNF-blocker infliximab. The disease activity score (DAS) was measured every three months and treatment was changed or added to in case of insufficient response (DAS >2.4). This thesis shows that continued low disease activity steered treatment is possible and leads to maintenance of good functional ability in the majority of patients during 8 years of follow-up. Initial combination therapy is beneficial in the first months of treatment but is not associated with better longer-term results, except in anti-citrullinated protein antibodies positive patients. Initial combination therapy with TNF-blo cker infliximab can be successfully discontinued in over 50% of early RA patients, and in around 20% of all patients, all medication can be stopped when prolonged remission is achieved. Show less
