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  • Title: A Phase IIIb Open-Label, Single-Arm Study of Afatinib in EGFR TKI-Naïve Patients with EGFRm+ NSCLC: Final Analysis, with a Focus on Patients Enrolled at Sites in China.
    Author: Tu HY, Feng J, Shi M, Zhao J, Wang Y, Chang J, Wang J, Cheng Y, Zhu J, Tan EH, Li K, Zhang Y, Lee V, Yang CT, Su WC, Lam DC, Srinivasa BJ, Rajappa S, Ho CL, Lam KC, Hu Y, Bondarde SA, Liu X, Tian Y, Xue Z, Cseh A, Huang DC, Zhou C, Wu YL.
    Journal: Target Oncol; 2022 Jan; 17(1):1-13. PubMed ID: 35020119.
    Abstract:
    BACKGROUND: Afatinib has been shown as a suitable option for the treatment of epidermal growth factor receptor mutation-positive (EGFRm+) non-small-cell lung cancer (NSCLC) in randomized controlled trials. However, patients treated in real-world clinical practice, including elderly patients, and those with brain metastases or poor Eastern Cooperative Oncology Group (ECOG) performance statuses, are often excluded from these studies. OBJECTIVE: To report the final results, with a particular focus on patients enrolled in China, from a prospective phase IIIb, "near real-world" study of afatinib in tyrosine kinase inhibitor (TKI)-naïve Asian patients with EGFRm+ NSCLC. PATIENTS AND METHODS: NCT01953913 was conducted at 34 centers across Asia. Entry criteria were broad to reflect real-world settings. Patients received afatinib 40 mg/day until tumor progression, lack of clinical benefit, or poor tolerability. Assessments included safety, time to symptomatic progression (TTSP), and progression-free survival (PFS). RESULTS: 541 patients were treated, of whom 412 were enrolled in China. Dose reductions were implemented in 28.7% of patients overall, and 17.7% of patients from China. Safety findings were consistent with phase III studies of afatinib. Median TTSP in all patients was 14.0 months (95% CI 12.9-15.9), and median PFS was 12.1 months (95% CI 11.0-13.6). Median TTSP (13.8 months, 95% CI 12.7-16.1) and PFS (11.4 months, 95% CI 10.9-13.7) were similar in patients from China to the overall population. Among patients from China who had dose reductions, TTSP was numerically longer than in those who did not (16.4 vs. 13.8 months; P = 0.0703), while PFS was significantly longer (13.9 vs. 11.1 months; P = 0.0275). Among patients from China with brain metastases, TTSP was numerically shorter than in those without (11.0 vs. 14.4 months; P = 0.0869), whereas PFS was significantly shorter (9.2 vs. 12.9 months; P = 0.0075). CONCLUSIONS: Safety data for afatinib when used in a "near real-world" setting in patients with EGFRm+ NSCLC was consistent with the known safety profile of afatinib. Supporting efficacy data of afatinib were provided in all patients, and in those enrolled in China. Tolerability-guided afatinib dose reduction allowed patients to remain on treatment and continue to experience clinical benefit. TRIAL REGISTRATION NUMBER AND DATE OF REGISTRATION: NCT01953913 (1 October 2013).
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