a nonsignificant trendp = 0.08
If the cohorts were analyzed independently, the significances remained for the Lund cohort, but only mutational status, not histological type, correlated significantly to PD-L1 expression in the Halmstad cohort (in the Lund cohort, there was only a nonsignificant trend for lower PD-L1 in cytology than biopsies, p = 0.08). 2.3.