showed a trendP=0.08
Patients who received prior afatinib showed a trend towards a lower ORR of 32% with osimertinib use vs. 46.5% in patients who received prior 1G EGFR TKI (P=0.08) despite a similar rate of T790M positivity (79.9% with 1G-TKI and 72.3% with afatinib use).