Final progression-free survival results from the J-ALEX study of alectinib versus crizotinib in ALK-positive non-small-cell lung cancer
Mené sur 207 patients atteints d'un cancer du poumon non à petites cellules ALK+, cet essai de phase III compare l'efficacité, du point de vue de la survie sans progression, et la toxicité de l'alectinib et du crizotinib (durée médiane de suivi : 42 mois)
Objectives : The J-ALEX study compared the efficacy and safety of alectinib with crizotinib in Japanese patients with advanced ALK-positive non-small-cell lung cancer (NSCLC). Superiority in independent review facility (IRF)-assessed progression-free survival (PFS) was demonstrated for alectinib at the second pre-planned interim PFS analysis (data cutoff: December 3, 2015; hazard ratio [HR] 0.34, 99.7% confidence interval [CI]: 0.17–0.71, P < 0.0001). We report final PFS data and the second pre-planned interim analysis of overall survival (OS) and safety (data cutoff: June 30, 2018). Methods : Patients aged ≥20 years who were ALK inhibitor-naïve and chemotherapy-naïve, or had received one prior chemotherapy regimen, were randomized to receive alectinib 300 mg (n = 103) or crizotinib 250 mg (n = 104) twice daily. The primary end point was IRF-assessed PFS. Secondary end points included OS and safety. All patients entered survival follow-up in July 2018. Results : Median follow-up was 42.4 months for alectinib and 42.2 months for crizotinib. Sustained improvement in IRF-assessed PFS with alectinib was shown (HR 0.37, 95% CI 0.26–0.52; median PFS 34.1 months vs 10.2 months crizotinib). At the second interim OS analysis, superiority of alectinib to crizotinib could not be concluded (stratified HR 0.80, 99.8799% CI: 0.35–1.82, stratified log-rank P = 0.3860; median OS not reached alectinib vs 43.7 months crizotinib). Fewer alectinib-treated patients experienced grade ≥3 adverse events (36.9% vs 60.6% crizotinib). Conclusions : At the final PFS analysis, alectinib continued to demonstrate superiority in IRF-assessed PFS versus crizotinib in ALK-inhibitor-naïve ALK-positive NSCLC, with a favorable safety profile. OS follow-up continues.
Lung Cancer 2019