In our study, it seems that patients harboring the EGFR 21L858R mutation had shorter overall and intracranial PFS than those with the EGFR 19del mutation, but this difference did not reach statistical significance (overall PFS: 2.8 vs . 5.1 months, p = 0.360; intracranial PFS: 4.2 vs . 5.1 months, p = 0.650) ( Figure 5 ).
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Efficacy of immune checkpoint inhibitor therapy in EGFR mutation-positive patients with NSCLC and brain metastases who have failed EGFR-TKI therapy.
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6.5 months, p = 0.077) had shorter intracranial PFS; although these differences were not statistically significant, there was a trend toward significance.