Real-world usage and clinical outcomes of alectinib among post-crizotinib progression anaplastic lymphoma kinase positive non-small-cell lung cancer patients in the USA
Authors DiBonaventura MD, Wong W, Shah-Manek B, Schulz M
Received 27 June 2017
Accepted for publication 10 November 2017
Published 22 December 2017 Volume 2018:11 Pages 75—82
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 2
Editor who approved publication: Prof. Dr. Geoffrey Pietersz
Marco D DiBonaventura,1 William Wong,2 Bijal Shah-Manek,3,4 Mathias Schulz2
1Ipsos Healthcare, Global Evidence, Value & Access, New York, NY, 2Genentech, US Medical Affairs, San Francisco, CA, 3Ipsos Healthcare, Global Evidence, Value & Access, San Francisco, CA, 4College of Pharmacy, Touro University California, CA, USA
Background: Alectinib is an approved treatment for anaplastic lymphoma kinase (ALK)-positive patients with advanced non-small-cell lung cancer. Despite positive supporting clinical data, there is a lack of real-world information on the usage and patient outcomes of those treated with alectinib post-crizotinib progression.
Methods: Participating oncologists (N=95) in the USA were recruited from an online physician panel to participate in a retrospective patient chart review. Physicians randomly selected eligible patients (ie, patients who progressed on crizotinib as their first ALK inhibitor and were treated with alectinib as their second ALK inhibitor), collected demographics and clinical history from their medical charts, and entered the data into an online data collection form.
Results: A total of N=207 patient charts were included (age: 60.1±10.4 years; 53.6% male). The patients in our sample were older (median age of 60 vs 53 years), were more likely to be current smokers (12% vs 1%), had better performance status (45% vs 33% had an Eastern Cooperative Oncology Group [ECOG] of 0), and were less likely to have an adenocarcinoma histology (83% vs 96%) relative to published clinical trials. The objective response rate was higher than in clinical trials (67.1% vs 51.3%, respectively) as was the disease control rate (89.9% vs 78.8%, respectively), though it varied by race/ethnicity, ECOG, and prior treatment history. Discontinuation (0.0%) and dose reductions (3.4%) due to adverse events were uncommon in alectinib.
Conclusion: Patients using alectinib post-crizotinib in clinical practice are older, more racially/ethnically and histologically diverse than patients in published trials. Real-world response rates were high and similar to those reported in clinical studies, though there is some variation by patient characteristics. Alectinib was well tolerated in clinical practice as reflected by the rates of discontinuation, dose reductions, and dose interruptions.
Keywords: alectinib, anaplastic lymphoma kinase, non-small-cell lung cancer, treatment patterns, outcomes, ALK inhibitor, ALK+
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