EGFR and non-small cell lung carcinoma: Despite the difficulty of following up treatments in patients with EGFR‐mutated NSCLC treated with first‐line EGFR‐TKIs, our observations imply that OS correlates more strongly with PPS than PFS in patients with EGFR‐mutated NSCLC who received EGFR‐TKIs as the first‐line of treatment.