marginal significancep=0.09
However, no significant correlation was found between baseline characteristics and PPS ( online supplemental table 13 ), although BRAF mutation seemed to be a protective factor with marginal significance towards longer PPS (HR 0.630, 95% CI 0.368 to 1.080, p=0.09) with targeted therapy as a second-line regimen after PD from anti-PD-1 monotherapy for these subgroup of patients.