100P - Afatinib vs gefitinib for treatment-naïve patients with EGFRm+ NSCLC (LUX-Lung 7): Analysis of time to treatment failure and impact of afatinib dos...

Date 07 May 2017
Event ELCC 2017
Session Poster Display Session
Topics Non-Small-Cell Lung Cancer, Locally Advanced
Cancer Immunology and Immunotherapy
Lung and other Thoracic Tumours
Presenter James Chih-Hsin Yang
Citation Annals of Oncology (2017) 28 (suppl_2): ii28-ii51. 10.1093/annonc/mdx091
Authors J.C. Yang1, L. Paz-Ares2, E. Tan3, K. O'Byrne4, L. Zhang5, M. Boyer6, T. Mok7, V. Hirsh8, J. Fan9, K. Park10
  • 1National Taiwan University Hospital and National Taiwan University Cancer Center, 100 - Taipei/TW
  • 2Department Of Oncology, Hospital Universitario Doce de Octubre and CNIO, Madrid/ES
  • 3Department Of Medical Oncology, National Cancer Center, Singapore/SG
  • 4Department Of Oncology, Princess Alexandra Hospital and Queensland University of Technology, Brisbane/AU
  • 5Cancer Center of Sun Yat-Sen University, Guangzhou/CN
  • 6Department Of Oncology, Chris O'Brien Lifehouse, Camperdown/AU
  • 7Department Of Clinical Oncology, The Chinese University of Hong Kong, Hong Kong/CN
  • 8McGill University Health Centre, Montreal/CA
  • 9Boehringer Ingelheim Pharmaceuticals, Inc., Ridgefield/US
  • 10Department Of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul/KR

Abstract

Background

PFS was significantly improved in LUX-Lung 7 with afatinib (A) vs gefitinib (G). Time to treatment failure (TTF) was a co-primary endpoint to reflect clinical practice of continuing TKI tx beyond radiologic progression in the absence of clinical deterioration. An analysis of TTF and a post-hoc analysis of the impact of dose adjustment of A on PFS and AEs are reported here.

Methods

Patients (pts) were randomized to A 40mg/d or G 250mg/d until progressive disease (PD) or beyond if deemed beneficial. The dose of A could be reduced by 10mg decrements to a minimum of 20mg in the event of selected drug-related (DR) AEs. TTF was analyzed using a stratified log-rank test and Kaplan-Meier methods. PFS was compared between pts who had a dose reduction within 6 mos and those who received ≥40mg for 6 mos. Incidence/severity of common AEs before/after dose reduction was assessed.

Results

319 pts were randomized (160 A, 159 G). At data cut-off (21 Aug 2015), 87.5% A and 93.7% G pts had discontinued tx, mostly due to radiologic PD (69.4 vs 74.8%) or toxicity (11.3 vs 10.7%). 35.0% A and 29.6% G pts with clinical benefit continued tx beyond radiologic PD. Pts remained on tx significantly longer with A vs G (median TTF 13.7 vs 11.5 mos; HR 0.73 [95% CI 0.58–0.92]; p = 0.007; pts on tx at 2 yrs: 25.0 vs 13.2%). TTF subgroup analyses favored A. Risk of tx failure was reduced with A vs G regardless of EGFRm type or race. Median tx duration beyond PD with A and G was 2.7 and 2.0 mos, respectively. 63 pts (39%) treated with A had a dose reduction to 30mg; 21 (13%) had further reduction to 20mg. There was no significant difference in PFS in pts who received <40 mg or ≥ 40 mg (median 12.8 vs 11.0 mos; HR 1.3 [95% CI 0.9–2.0]; p = 0.14). Dose reduction of A reduced the incidence/severity of DR AEs: grade ≥3 diarrhea, rash/acne and stomatitis were reduced from 25.4%, 20.6% and 7.9%, to 9.5%, 3.2% and 3.2%, respectively.

Conclusions

TTF was significantly improved with first-line A vs G in EGFRm+ NSCLC, which testifies to the tolerability of A, and suggests that it may confer additional clinical benefit in pts who continue tx beyond PD. Dose adjustment of A reduced the frequency/intensity of DR AEs without compromising efficacy.

Clinical trial identification

LUX-Lung 7: EudraCT No: 2011-001814-33

Legal entity responsible for the study

Boehringer Ingelheim

Funding

Boehringer Ingelheim

Disclosure

J.C-H. Yang: Ad board and honoraria: BI, Lilly, Bayer, Roche/Genentech/Chugai, Astellas, MSD, Merck Serono, Pfizer, Novartis, Clovis, Celgene, Merrimack, Yuhan Pharmaceuticals, BMS, Ono pharmaceutical Daiichi, Sankyo, and AZ. L. Paz-Ares: Honoraria from Pfizer, Bristol-Myers Squibb, MSD, Novartis, Roche, Eli Lilly, Boehringer lngelheim, Clovis Oncology, AstraZeneca, and Amgem. K. O\'Byrne: Ad board, speaker bureau, travel to international conferences and honoraria: AZ, BMS, Roche-Genentech, MSD, Pfizer, BI. Ad board and speaker bureau: Novartis. 3 Patents: 1 on novel drugs, 2 on biomarkers, IP held by Queensland University of Technology. M. Boyer: Ad board: BMS, Merck Sharpe and Dohme, Pfizer Board of Directors: IASLC Research: Pfizer, Genentech, BI, AZ, Novartis, Merck Sharpe and Dohme, Clovis Honoraria: Merck Sharpe and Dohme, BI, BMS, AZ. T. Mok: Receipt of grants/research supports: AstraZeneca, BI, Pfizer, Novartis, SFJ, Roche, MSD, Clovis Oncology, BMS; Receipt of honoraria or consultation fees: AstraZeneca, Roche/Genentech, Pfizer, Eli Lilly, BI, Merck Serono, MSD, Janssen, Clovis Oncology, BioMarin, GSK, Novartis, SFJ Pharmaceutical, ACEA Biosciences, Inc., Vertex Pharmaceuticals, BMS, AVEO & Biodesix, Prime Oncology, Amgen; Participation in a company sponsored speaker’s bureau: AstraZeneca, Roche/Genentech, Pfizer, Eli Lilly, BI, MSD, Amgen, Janssen, Clovis Oncology, GSK, Novartis, BMS, PrIME Oncology; Stock shareholder: Sanomics Limited. V. Hirsh: Honoraria for participating on advisory boards for Boehringer Ingelheim, AstraZeneca, Roche, Merck, Eli Lilly, Pfizer, Amgen, and Bristol-Myers Squibb. K. Park: Participated on advisory boards for Astellas, AstraZeneca, Boehringer Ingelheim, Clovis Oncology, Eli Lilly, Hanmi, MSD, Novartis, and Roche. All other authors have declared no conflicts of interest.