Comparative Effectiveness of Biological Medicines in Rheumatoid Arthritis
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RESEARCH Comparative effectiveness of biological medicines in rheumatoid BMJ: first published as 10.1136/bmj.m2288 on 7 July 2020. Downloaded from arthritis: systematic review and network meta-analysis including aggregate results from reanalysed individual patient data Kirsten Janke,1 Katharina Biester,1 Dietmar Krause,3 Bernd Richter,4 Christoph Schürmann,2 Katharina Hirsch,2 Helmut Hörn,1 Michaela Florina Kerekes,1 Petra Kohlepp,1 Beate Wieseler1 1Drug Assessment Department, ABSTRACT from reanalyses of individual patient data allowed Institute for Quality and OBJECTIVE extensive analyses yielding sufficiently similar Efficiency in Health Care, Im To assess the comparative effectiveness of biological populations and homogeneous study results for Mediapark 8, Cologne 50670, Germany medicines in rheumatoid arthritis in sufficiently network meta-analyses, including up to 35 studies 2Medical Biometry Department, similar patient populations, based on the current on eight biological medicines combined with Institute for Quality and definitions of key outcomes. methotrexate. These analyses showed few statistically Efficiency in Health Care, significant differences between the combination Cologne, Germany DESIGN treatments. For example, anakinra showed less 3Rheumatology Practice Systematic review and network meta-analysis Gladbeck, Gladbeck, Germany including aggregate results from reanalysed individual benefit than almost all the other seven biological 4Cochrane Metabolic and patient data. medicines regarding clinical remission or low disease Endocrine Disorders Group, activity (clinical disease activity index ≤2.8 or ≤10, DATA SOURCES Institute of General Practice, respectively) and certolizumab pegol showed more Clinical study reports and aggregate results from Medical Faculty of the Heinrich- harm than the other seven biological medicines Heine-University Düsseldorf, reanalyses of individual patient data on key outcomes regarding serious adverse events or infections. Düsseldorf, Germany for rheumatoid arthritis provided by study sponsors Some outcomes had very wide 95% confidence Correspondence to: B Wieseler for studies conducted up to 2017, and several [email protected] intervals, potentially implying unidentified differences databases and registries from inception up to (ORCID 0000-0002-3519-754X) between the eight biological medicines, but wide February 2017. Additional material is published 95% confidence intervals were less prominent for online only. To view please visit ELIGIBILITY CRITERIA FOR SELECTING STUDIES the journal online. low disease activity, serious adverse events, and Randomised controlled trials investigating patient C ite this as: BMJ2020;370:m2288 infections. Owing to a lack of head-to-head trials, relevant outcomes in adults with rheumatoid arthritis http://www.bmj.com/ http://dx.doi.org/10.1136 bmj.m2288 results were mainly based on indirect comparisons treated with biological medicines in combination with with a limited number of studies, and recently Accepted: 30 April 2020 methotrexate after methotrexate failure for at least 24 approved Janus kinase inhibitors could not be weeks. included. RESULTS CONCLUSIONS 45 eligible trials were identified. Combining data For patients with rheumatoid arthritis after from clinical study reports and aggregate results methotrexate failure, only minor differences in benefits and harms were seen between biological on 26 September 2021 by guest. Protected copyright. medicines in combination with methotrexate. WH AT IS ALREADY KNOWN ON THIS TOPIC However, the analysis was hampered by a lack of long Previous meta-analyses have shown that most biological medicines combined term direct comparisons. The substantial information with methotrexate are more effective at controlling disease activity in rheumatoid gain achieved by the reanalysis of individual patient arthritis than treatment with methotrexate alone data calls for the routine availability of individual patient data. However, the comparative benefits and harms of the biological medicines are still under discussion Previous network meta-analyses on this topic have included heterogeneous Introduction patient populations and older definitions of key outcomes such as clinical Rheumatoid arthritis is one of the most common chro remission and low disease activity, making the results of these analyses nic inflammatory diseases. Joint inflammation can lead inconclusive to pain, stiffness, swelling, structural damage, and im paired function.13 Ultimately, rheumatoid arthritis can WH AT THIS STUDY ADDS cause progressive disability and premature death.47 Inclusion of data from clinical study reports and reanalyses from individual Treatment for the rheumatoid arthritis primarily patient data has enabled the inclusion of similar patient populations and aims to reduce disease activity to a level where patients unknown results on current definitions of clinical remission and low disease are free of signs and symptoms of inflammatory activity activity and other endpoints in this network meta-analysis (that is, clinical remission).8 Low disease activity can This systematic review and network meta-analysis indicates minor differences also be an acceptable treatment goal, especially for between biological medicines for the treatment of rheumatoid arthritis, when patients with previous treatment failure.9 The most combined with methotrexate after methotrexate failure recent and stringent definitions for clinical remission This information could be important for clinical practice, considering the changes and low disease activity have been suggested by the in treatment strategies for rheumatoid arthritis and the increasing number of American College of Rheumatology (ACR) and the 10 biosimilar biological medicines available European League Against Rheumatism (EULAR). the bmj | BMJ 2020;370:m2288 | doi: 10.1136/bmj.m2288 1 RESEARCH Current options for rheumatoid arthritis include all sponsored published and unpublished studies disease modifying antirheumatic drugs (DMARDs), investigating the biological medicine concerned, and BMJ: first published as 10.1136/bmj.m2288 on 7 July 2020. Downloaded from which can be combined with nonsteroidal anti of CONSORT compliant documents (in general, the inflammatory drugs (NSAIDs) and corticosteroids.3 9 11 complete clinical study reports) on all relevant studies DMARDs are divided into conventional synthetic selected by IQWiG. This procedure was required to DMARDs (eg, methotrexate), targeted synthetic DMARDs avoid bias due to selective provision of data. For (Janus kinase inhibitors), and biological DMARDs all investigator initiated trials selected by IQWiG, (biological medicines or bDMARD).12 Although a wide sponsors were also asked to supply complete clinical range of biological medicines is available, their com study reports, if available. parative effectiveness is still under discussion. To meet both the methodological requirements of This systematic review of randomised controlled a network metaanalysis and the current recommen trials aimed to compare the benefits and harms of dations of rheumatoid arthritis societies, we aimed biological medicines in combination with methotrexate to include results from sufficiently similar patient in patients with rheumatoid arthritis after methotrexate populations and to use the most current definitions failure. Given the many biological medicines available, of rheumatoid arthritis outcomes. For this purpose, we used a network metaanalysis to compare several aggregate results of two types of reanalyses of different treatments. An important prerequisite for individual patient data from the studies included such an analysis is the similarity of the studies were requested from the study sponsors. Firstly, if included. We obtained similar patient populations by only a subpopulation of the overall study population using aggregate results from systematic reanalyses of was relevant for the current systematic review, individual patient data performed by study sponsors aggregate results from a reanalysis of characteristics for those studies with heterogeneous populations. We of this subpopulation (eg, of the patients without pre also obtained aggregate results according to current treatment with biological medicines) and results on definitions of clinical remission and low disease all outcomes were requested. Secondly, for all studies activity by reanalyses of individual patient data by or study subpopulations included, aggregate results study sponsors. from reanalyses of clinical remission (clinical disease The systematic review formed part of a health activity index (CDAI) ≤2.8) and low disease activity technology assessment of biological medicines in (CDAI ≤10) were requested, if not already available in rheumatoid arthritis conducted by the German health the study documentation. http://www.bmj.com/ technology assessment agency, the Institute for Quality We included published and unpublished studies and Efficiency in Health Care (IQWiG). The full report with the following characteristics: randomised clinical (in German) and protocol are available on the IQWiG trials of adults (aged ≥18) with rheumatoid arthritis website.13 IQWiG’s methodological approach for and a minimum study duration of 24 weeks comparing systematic reviews is described in its methods paper.14 biological medicines with each other or with a potential common comparator for inclusion in a net Methods work metaanalysis. Studies were included if the Search strategy and study