RT Journal Article SR Electronic T1 Comparison of adding tocilizumab to methotrexate with switching to tocilizumab in patients with rheumatoid arthritis with inadequate response to methotrexate: 52-week results from a prospective, randomised, controlled study (SURPRISE study) JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 1917 OP 1923 DO 10.1136/annrheumdis-2015-208426 VO 75 IS 11 A1 Kaneko, Yuko A1 Atsumi, Tatsuya A1 Tanaka, Yoshiya A1 Inoo, Masayuki A1 Kobayashi-Haraoka, Hitomi A1 Amano, Koichi A1 Miyata, Masayuki A1 Murakawa, Yohko A1 Yasuoka, Hidekata A1 Hirata, Shintaro A1 Nagasawa, Hayato A1 Tanaka, Eiichi A1 Miyasaka, Nobuyuki A1 Yamanaka, Hisashi A1 Yamamoto, Kazuhiko A1 Takeuchi, Tsutomu YR 2016 UL http://ard.bmj.com/content/75/11/1917.abstract AB Objective To compare the efficacy and safety between tocilizumab added to methotrexate and tocilizumab switched from methotrexate in patients with active rheumatoid arthritis (RA).Methods This is a 2-year randomised, controlled study. RA patients with moderate or high disease activity despite methotrexate were randomly assigned either to tocilizumab added to methotrexate (add-on) or tocilizumab switched from methotrexate (switch). The primary endpoint was the DAS28 remission rate at week 24. Secondary objectives included other clinical efficacy indices, radiological outcomes assessed with the van der Heijde-modified total Sharp scoring system (mTSS), and safety.Results Of 223 randomised patients, 83% completed 52 weeks. DAS28 remission rates at week 24 were 70% for add-on and 55% for switch (p=0.02), but they became comparable at week 52 (72% vs 70%, p=0.86). Structural remission rates (mTSS≤0.5) at week 52 were not different (66% vs 64%, p=0.92). However, clinically relevant radiographic progression rates (CRRP; mTSS≥3) tended to be higher with the switch than with the add-on (15% vs 7%, p=0.07). Radiographic progression in the CRRP patients was larger with the switch than with the add-on (9.0/year vs 5.0/year, p=0.04). The difference in the mean C-reactive protein of the CRRP patients was significant for the first 24 weeks (1.56 vs 0.49, p=0.001) but not for the following 28 weeks (0.10 vs 0.04, p=0.1). Overall safety was preferable in the switch group.Conclusions In RA patients with inadequate response to methotrexate, tocilizumab added to methotrexate more rapidly suppressed inflammation than tocilizumab switched from methotrexate, leading to superior clinical efficacy and prevention of joint destruction.Trial registration number NCT01120366.