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Multicenter Study
. 2021 Mar 1;21(1):208.
doi: 10.1186/s12885-021-07861-1.

A phase II study of first-line afatinib for patients aged ≥75 years with EGFR mutation-positive advanced non-small cell lung cancer: North East Japan Study Group trial NEJ027

Affiliations
Multicenter Study

A phase II study of first-line afatinib for patients aged ≥75 years with EGFR mutation-positive advanced non-small cell lung cancer: North East Japan Study Group trial NEJ027

Yuji Minegishi et al. BMC Cancer. .

Abstract

Background: Lung cancer is most common among older individuals. However, polypharmacy and comorbidities, which are also more common in older individuals, can limit treatment options. Previous studies suggest that afatinib can be used safely and effectively in elderly patients. This study investigated the anti-tumour activity and safety profile of first-line afatinib in previously-untreated elderly Japanese patients with EGFR mutation-positive non-small cell lung cancer (NSCLC).

Methods: This was a single-arm, open-label, phase II study, performed in multiple centres in Japan. Previously untreated patients, aged ≥75 years, with EGFR mutation-positive (Del19 or L858R) advanced NSCLC were treated with afatinib 40 mg until disease progression or unacceptable toxicity. Adverse events (AEs) were managed with protocol-defined dose adjustments. The primary endpoint was objective response rate (ORR) by central review.

Results: In total, 38 patients received at least one dose of afatinib, and 37 were evaluable for response. Median age was 77.5 years (range 75-91), all patients had an Eastern Cooperative Oncology Group performance status of 0 or 1, and 60.5% had Del19-positive disease. Median follow-up was 838 days. ORR was 75.7% (2 complete responses and 26 partial responses). Median progression-free survival was 14.2 months (95% confidence interval [CI], 9.5-19.0). Median overall survival (OS) was 35.2 months (95% CI, 35.2-not reached); the 2-year OS rate was 78.3%. The most common grade 3/4 treatment-related AEs (TRAEs) were diarrhoea (28.9%), paronychia (23.7%), and rash/acne (15.8%). Dose reductions due to TRAEs were reported in 78.9% of patients, and eight (21.1%) patients discontinued afatinib due to TRAEs. No treatment-related deaths were reported.

Conclusion: Although dose adjustments were relatively common in this small group of Japanese patients aged ≥75 years with EGFR mutation-positive NSCLC, discontinuation occurred much less frequently, and most patients were able to stay on treatment for well over a year. Further, afatinib was associated with high response rates and prolonged PFS and OS.

Trial registration: The trial is registered with Japan Registry of Clinical Trials (JRCT) as trial number 031180136 (date of initial registration: 19 February 2019), and the University Hospital Network (UMIN) as trial number 000017877 (date of initial registration: 11 June 2015).

Keywords: Afatinib; Dose adjustment; EGFR mutation; Efficacy; Elderly patients; Japan; Non-small cell lung cancer; Safety.

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Conflict of interest statement

O.Y. reports honoraria from Ono Pharmaceutical Co., Ltd., Bristol-Myers Squibb, Taiho Pharmaceutical Co., Ltd., MSD, Chugai Pharmaceutical Co., Ltd., and AstraZeneca. S.S. reports honoraria from Nippon Boehringer Ingelheim Co., Ltd., AstraZeneca, Chugai Pharmaceutical Co., Ltd., MSD, Bristol-Myers Squibb, Ono Pharmaceutical Co., Ltd., Eli Lilly and Company, Pfizer, Novartis, Taiho Pharmaceutical Co., Ltd., and Kyowa Hakko Kirin Co., Ltd. S.W. reports honoraria from Eli Lilly and Company, Pfizer, Novartis, AstraZeneca, Chugai Pharmaceutical Co., Ltd., Bristol-Myers Squibb, Boehringer Ingelheim, MSD, Ono Pharmaceutical Co., Ltd., Daiichi Sankyo and Taiho Pharmaceutical Co., Ltd. M.M. reports honoraria from AstraZeneca, Boehringer Ingelheim, Chugai Pharmaceutical Co., Ltd., Eli Lilly and Company, MSD, Novartis Pharma, Ono Pharmaceutical Co., Ltd. and Taiho Pharmaceutical Co., Ltd. O.H. reports honoraria from AstraZeneca, Boehringer Ingelheim and Novartis, and grants or funds from GlaxoSmithKline, AstraZeneca, Novartis, Bayer Health Care, Boehringer Ingelheim and Daiichi Sankyo. S.M. reports honoraria from AstraZeneca, Bristol-Myers Squibb, Chugai Pharmaceutical Co., Ltd., Eisai Co., Ltd., Eli Lilly Japan, MSD, Nippon Boehringer Ingelheim Co., Ltd., Ono Pharmaceutical Co., Ltd., Pfizer Japan Inc., and Taiho Pharmaceutical Co., Ltd., and research funding to their institution from Nippon Boehringer Ingelheim Co., Ltd. K.K. reports honoraria (speech fees) from AstraZeneca, Boehringer Ingelheim, Bristol-Myers Squibb, Pfizer, Eli Lilly and Company, Taiho Pharmaceutical Co., Ltd., Chugai Pharmaceutical Co. and Ono Pharmaceutical Co., Ltd. A.G. reports honoraria from Boehringer Ingelheim. Y.M., S.K., K.U., and T.N. declare no conflict of interest.

Figures

Fig. 1
Fig. 1
Kaplan–Meier survival analysis in the full analysis set (n = 37). a Progression-free survival (PFS)a. b Overall survival (OS). c Time to treatment failure (TTF). Abbreviations: CI confidence interval, NR not reached, QOD every other day. aPFS was censored for four patients receiving afatinib < 20 mg/day. These patients were treated as censored when they fell below the 20 mg/day minimum dose specified in the protocol
Fig. 2
Fig. 2
Treatment duration and afatinib dose in the safety analysis set (n = 38). Abbreviations: AE adverse event, CR complete response, NE not evaluable; OT other, PD progressive disease, PR partial response; QOD every other day, SD stable disease. aFor Patient 21, protocol treatment was discontinued due to disease progression; Thereafter, afatinib treatment beyond PD was discontinued due to skin disorders. bPatient 23 had no appropriate measurable lesion and was not included in the full analysis set

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