FRI0026 U-act-early trial 3 years follow-up. the longer effectiveness of treat-to-target strategies in early ra with tocilizumab, methotrexate, or their combination

Background The U-Act-Early trial was a 2 year placebo controlled, double-blind randomised controlled trial in early (DMARD-naive) RA patients treated to the target of sustained remission (SR), starting with tocilizumab (TCZ), methotrexate (MTX) or their combination (TCZ +MTX) 1 . When the treatment target was achieved, medication was tapered and stopped, if patients remained in remission. During the trial period, the strategies starting with TCZ were more effective than the strategy initiating MTX only. Subsequently, patients were followed for 3 years, during which treatment was open and according to usual care. Objectives To establish the effectiveness of step-up strategies starting with MTX, TCZ or their combination in early RA over a 5 year period. Methods 226 of the 317 patients starting in the U-Act-Early trial (initial strategy: 75 TCZ +MTX, 79 TCZ, 72 MTX) participated in the 3 year follow-up phase. DAS28 was collected every 3 months during the first year and every 6 months thereafter. The primary endpoint, was SR, defined as DAS28 24 weeks. Secondary endpoints were sustained drug free remission (sDFR), defined as remission for ≥3 months after tapering and stopping all medication during SR, and DAS28 over 5 years. Differences between the randomised strategies in proportions of patients achieving SR and sDFR and durations of SR and sDFR were tested with Cochran-Mantel-Haenszel and Kruskal-Wallis tests, respectively. A mixed model analysis was used to compare DAS28 over time, with a random intercept and fixed effects for: treatment, visit-week, the interaction visit-week*treatment, and it was corrected for gender, age, and for DAS28, RA-duration, CRP and RF-positivity at baseline. Results Baseline characteristics at the start of U-Act-Early of the patients included in this 3 year follow-up study were not significantly different from those of all patients included in U-Act-Early trial. Over 5 years, SR was achieved in 224/226 (99%) patients without significant differences (p=0.15) between the initial treatment strategies in proportions of patients achieving it, nor in durations (p=0.96) of these endpoints (table 1). Neither between-group significant differences were found for sDFR (proportion; p=0.10, duration; p=0.27), only a tendency for longer duration in TCZ +MTX. The mean DAS28 over 5 years was not significantly different between initial strategy groups (figure 1), but it was on average 0.15 (95% CI −0.12 to 0.42) units higher in the TCZ(+MTX) groups, compared to MTX initiation group. Conclusions On the short term, initiation of TCZ-based strategies yields the most benefit, but on longer term, no difference in important clinical outcomes was found anymore between initial strategy groups, probably due to continuation of the treat-to-target principle 2 . Almost all patients achieved SR over 5 years, with a tendency for longer duration of sDFR in the TCZ+MTX strategy. References [1] Bijlsma JWJ, Welsing PMJ, Woodworth TG, et al. Lancet. 2016;388:343–55. [2] Smolen JS, Landewe R, Bijlsma J, et al. Ann Rheum Dis. 2017;76:960–77. Disclosure of Interest M. Verhoeven: None declared, M. de Hair: None declared, P. Welsing: None declared, A. Petho-Schramm Employee of: an employee of F Hoffmann-La Roche, M. Borm Employee of: an employee of Roche Nederland BV, X. Teitsma: None declared, J. van Laar Grant/research support from: received fees from Arthrogeen, MSD, Pfizer, Eli Lilly, and BMS and research grants from Astra Zeneca, Roche-Genentech, F. Lafeber Grant/research support from: reports grants from Roche, J. Bijlsma Grant/research support from: The department of the author who included patients (JWJB) in the U-Act-Early trial received reimbursements from Roche Nederland BV. JWJB reported grants and fees from Roche, AbbVie, Bristol-Myers Squibb, Merck Sharp and Dohme, Pfizer, and UCB, J. Jacobs Grant/research support from: The department of the author who included patients (JWGJ) in the U-Act-Early trial received reimbursements from Roche Nederland BV