PMID- 38348963 OWN - NLM STAT- MEDLINE DCOM- 20240214 LR - 20240312 IS - 2045-7634 (Electronic) IS - 2045-7634 (Linking) VI - 13 IP - 2 DP - 2024 Jan TI - Real-world analysis of adverse event rates after initiation of ibrutinib among Medicare beneficiaries with chronic lymphocytic leukemia. PG - e6953 LID - 10.1002/cam4.6953 [doi] LID - e6953 AB - BACKGROUND: The first-generation BTK inhibitor ibrutinib is a standard-of-care therapy in the treatment of chronic lymphocytic leukemia (CLL) despite potential side effects that often lead to discontinuation. METHODS: This study used 2013-2019 claims data to describe the incidence rate of adverse events (AEs) among elderly Medicare beneficiaries newly initiating ibrutinib for CLL. RESULTS: The final sample contained 11,870 Medicare beneficiaries with CLL (mean age 77.2) newly initiating ibrutinib, of whom 65.2% discontinued over mean follow-up of 2.3 years. The overall incidence rate of AEs was 62.5 per 1000 patient-months for all discontinuers and 32.9 per 1000 patient-months for non-discontinuers. Discontinuers had a higher incidence rate of AEs per 1000 patient-months compared with non-discontinuers for all AEs examined, including infection (22.8 vs. 14.5), atrial fibrillation (15.1 vs. 7.0), anemia (21.9 vs. 14.5), and arthralgia/myalgia (19.5 vs. 13.6). CONCLUSION: In this first real-world study of a national sample of elderly US patients treated with ibrutinib, we found a clear unmet need for improved management of ibrutinib-related AEs and/or new treatments to improve real-world outcomes in patients with CLL. CI - (c) 2024 Merck Sharp & Dohme LLC. Cancer Medicine published by John Wiley & Sons Ltd. FAU - Huntington, Scott F AU - Huntington SF AUID- ORCID: 0000-0001-7071-6475 AD - Department of Internal Medicine, Section of Hematology, Yale University School of Medicine, New Haven, Connecticut, USA. FAU - de Nigris, Enrico AU - de Nigris E AD - MSD (UK) Limited, London, UK. FAU - Puckett, Justin T AU - Puckett JT AUID- ORCID: 0000-0002-5135-7216 AD - COVIA Health Solutions, Ambler, Pennsylvania, USA. FAU - Kamal-Bahl, Sachin AU - Kamal-Bahl S AD - COVIA Health Solutions, Ambler, Pennsylvania, USA. FAU - Farooqui, Mohammed AU - Farooqui M AD - Merck & Co., Inc, Rahway, New Jersey, USA. FAU - Ryland, Katherine AU - Ryland K AD - Merck & Co., Inc, Rahway, New Jersey, USA. FAU - Sarpong, Eric M AU - Sarpong EM AD - Merck & Co., Inc, Rahway, New Jersey, USA. FAU - Leng, Siyang AU - Leng S AD - Merck & Co., Inc, Rahway, New Jersey, USA. FAU - Yang, Xiaoqin AU - Yang X AD - Merck & Co., Inc, Rahway, New Jersey, USA. FAU - Doshi, Jalpa A AU - Doshi JA AD - Division of General Internal Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA. LA - eng GR - UL1 TR001863/TR/NCATS NIH HHS/United States PT - Journal Article PL - United States TA - Cancer Med JT - Cancer medicine JID - 101595310 RN - 1X70OSD4VX (ibrutinib) RN - JAC85A2161 (Adenine) RN - 0 (Piperidines) RN - 0 (Protein Kinase Inhibitors) SB - IM MH - Humans MH - Aged MH - United States/epidemiology MH - *Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy/epidemiology MH - Medicare MH - Adenine/adverse effects/*analogs & derivatives MH - Piperidines/adverse effects MH - Protein Kinase Inhibitors/adverse effects PMC - PMC10832339 OTO - NOTNLM OT - Medicare OT - adverse event OT - chronic lymphocytic leukemia OT - discontinuation OT - elderly OT - ibrutinib COIS- SFH: consultancy for Janssen, Pharmacyclics, AbbVie, AstraZeneca, Flatiron Health Inc., Novartis, SeaGen, Genetech, Merck, TG Therapeutics, ADC Therapeutics, Epizyme, Servier, Arvinas, and Thyme Inc.; research funding from Celgene, DTRM Biopharm, and TG Therapeutics; honoraria form Pharmacyclics and AstraZeneca, Bayer; EDN, MF, KR, ES, SL, and XY are employees of Merck Sharp & Dohme LLC, a subsidiary of Merck & Co., Inc., Rahway, New Jersey, USA; JP and SKB are employees of COVIA Health Solutions, a consulting form with clients in the biotech/pharmaceutical industry; JAD: consultancy for AbbVie, Acadia, Janssen, Merck, Otsuka, and Takeda; research funding from Janssen, Merck, and Spark Therapeutics. EDAT- 2024/02/13 12:48 MHDA- 2024/02/14 12:50 PMCR- 2024/02/01 CRDT- 2024/02/13 08:26 PHST- 2023/12/11 00:00 [revised] PHST- 2023/10/11 00:00 [received] PHST- 2024/01/10 00:00 [accepted] PHST- 2024/02/14 12:50 [medline] PHST- 2024/02/13 12:48 [pubmed] PHST- 2024/02/13 08:26 [entrez] PHST- 2024/02/01 00:00 [pmc-release] AID - CAM46953 [pii] AID - 10.1002/cam4.6953 [doi] PST - ppublish SO - Cancer Med. 2024 Jan;13(2):e6953. doi: 10.1002/cam4.6953.