ACR Meeting Abstracts

ACR Meeting Abstracts

Abstract Number: 514

A Pooled Analysis of 1-year Clinical Outcomes Among 6-month Responders and Non-responders from Three Randomized Controlled Studies of TNF Inhibitor Biosimilars in Patients with Rheumatoid Arthritis

Josef Smolen1, Michael Weinblatt 2, Paul Emery 3, Jung Yoon Choe 4, Jonathan Kay 5, Jieun Lee 6, Gihyun Myung 6, Hyoryeong Seo 6 and Jeehoon Ghil 6, 1Medical University of Vienna, Vienna, Austria, 2Brigham and Women's Hospital, Boston, MA, 3Leeds Institute of Rheumatic and Musculoskeletal Medicine, Leeds, United Kingdom, 4Division of Rheumatology, Daegu Catholic University Medical Center, Daegu, Republic of Korea, 5UMass Memorial Medical Center and University of Massachusetts Medical School, Worcester, MA, 6Samsung Bioepis Co., Ltd., Incheon, Republic of Korea

Meeting: 2019 ACR/ARP Annual Meeting

Keywords: , ,

Session Information

Date: Sunday, November 10, 2019

Title: RA – Treatments Poster I: Novel Treatments

Session Type: Poster Session (Sunday)

Session Time: 9:00AM-11:00AM

Background/Purpose: SB4, SB2, and SB5 are biosimilars of etanercept, infliximab, and adalimumab. Phase III randomized, double-blind studies were conducted to compare efficacy and safety between biosimilars and reference products.
The objective of this study is to assess and compare 1-year outcomes among 6-month responders and non-responders.

Methods: Patients who had 6-month data from each phase III study were pooled and categorized, based on their disease status at 6 months (week 24 for etanercept and adalimumab and week 30 for infliximab) and 1 year (week 52 for etanercept and adalimumab and week 54 for infliximab).
Responders included patients who achieved an ACR20 response or low disease activity (including remission) by DAS28, SDAI, or CDAI at 6 months. Those who did not or dropped out were considered non-responders.
The primary outcome was the proportion of responders who maintained responses from 6 months to 1 year or non-responders at 6 months who achieved responses at 1 year.

Results: Data from 1,437 patients were included in the analysis. For all treatments combined, 81.9% of ACR20 responders, 70.4%, 78.8%, and 78.0% of responders with DAS28, SDAI, and CDAI low disease activity (LDA) at 6 months maintained their responses at 1 year, and 35.1%, 19.1%, 27.3%, and 25.4% of 6-month non-responders achieved responses at 1 year, respectively. The proportions of patients maintaining or achieving an ACR20 response or DAS28, SDAI, and CDAI LDA at 1 year were similar across different treatment groups (Table 1).

Conclusion: A pooled analysis of TNF inhibitor biosimilars and reference products showed that about 20-30% of responders lost their response, while about 20-30% gained it. Thus, the overall stability of disease fluctuation in our 1-year phase III studies is a consequence of a similar success and failure rate. The validity of these data can be seen by the similarities in these outcomes between different types of TNF-inhibitors and similarity between biosimilars and respective reference products.

Table 1. Proportion of responders at 1 year based on 6-month clinical outcomes

Disclosure: J. Smolen, AbbVie, Amgen, Astra-Zeneca, Astro, Celgene Corporation, Celtrion, Eli Lilly, Glaxo, 8, AbbVie, Eli Lilly, Janssen, MSD, Pfizer, Roche, 2, ILTOO, Janssen, Medimmune, MSD, Novartis, Pfizer, Roche, Samsung, Sanofi, UCB, 8; M. Weinblatt, Abbvie, 5, AbbVie, 5, Amgen, 5, BMS, 2, 5, Bristol Myers Squibb, 2, 5, Bristol-Myers Squibb, 2, 5, Canfite, 1, 4, Corrona, 5, Crescendo Bioscience, 2, 5, Eli Lilly and Company, 5, Gilead, 5, Glaxo-Smith Kline, 5, GlaxoSmithKline, 5, GSK, 5, Horizon, 5, Lilly, 5, Lily, 5, Lycera, 1, 4, 5, Merck, 5, Novartis, 5, Pfizer, 5, Roche, 5, Samsung, 5, Samsung Bioepis Co., Ltd., 5, Sanofi Regeneron, 2, Sanofi/Regeneron, 2, Sanofi-Regeneron, 2, Scipher, 1, 4, 5, Set Point, 5, SetPoint, 5, Squibb, 5, Vorso, 1; P. Emery, AbbVie, 2, 5, 9, BMS, 2, 5, Bristol-Myers Squibb, 2, 5, 9, Gilead, 5, Lilly, 2, 5, 9, MSD, 2, 5, 9, Novartis, 2, 5, 9, Pfizer, 2, 5, 9, Roche, 2, 5, 9, Samsung, 2, 5, 9, Samsung Bioepis Co., Ltd., 2, Sandoz, 2, 5, 9, UCB, 2, 5, 9; J. Choe, None; J. Kay, AbbVie, 5, Abbvie, 5, Abbvie, Boehringer Ingelheim, Celltrion, Horizon Therapeutics, Merck, MorphoSys AG, Norvartis AG, Pfizer, Samsung Bioepis, Sandoz Inc., UCB Pharma, 5, AbbVie, Inc., 5, Boehringer Ingelheim GmbH, 5, Boehringer-Ingelheim, 5, Boehringer-Ingelheim GmbH, 5, Celltrion Healthcare, 5, Celltrion Healthcare Co. Ltd, 5, Celltrion Healthcare CO. Ltd, 5, Celltrion Healthcare Co. Ltd., 5, Gilead, 2, Gilead Sciences, 5, Gilead Sciences, Inc, 2, Gilead Sciences, Inc., 2, Gilead Sciences, Inc., Novartis AG, Pfizer, UCB Pharma, 2, Horizon Therapeutics, 5, Horizon Therapeutics PLC, 5, Merck Sharp & Dohme, 5, Merck Sharp & Dohme Corp, 5, Merck Sharp & Dohme Corp., 5, MorphoSys AG, 5, Novartis AG, 2, 5, Novartis Pharmaceuticals, 5, Pfizer, 2, 5, Pfizer Inc, 2, 5, Pfizer Inc., 2, 5, Samsung Bioepis, 5, Samsung Bioepis Co., Ltd., 5, Sandoz, 5, Sandoz Inc, 5, UCB, 2, 5, UCB Pharma, 2, 5, UCB, Inc., 2, 5; J. Lee, Samsung Bioepis Co., Ltd., 3; G. Myung, Samsung Bioepis Co., Ltd., 3; H. Seo, Samsung Bioepis Co., Ltd., 3; J. Ghil, Samsung Bioepis Co., Ltd., 3.

To cite this abstract in AMA style:

Smolen J, Weinblatt M, Emery P, Choe J, Kay J, Lee J, Myung G, Seo H, Ghil J. A Pooled Analysis of 1-year Clinical Outcomes Among 6-month Responders and Non-responders from Three Randomized Controlled Studies of TNF Inhibitor Biosimilars in Patients with Rheumatoid Arthritis [abstract]. Arthritis Rheumatol. 2019; 71 (suppl 10). https://acrabstracts.org/abstract/a-pooled-analysis-of-1-year-clinical-outcomes-among-6-month-responders-and-non-responders-from-three-randomized-controlled-studies-of-tnf-inhibitor-biosimilars-in-patients-with-rheumatoid-arthritis/. Accessed .

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