marginal significancep = 0.078
By contrast, upon awakening, the relative delta power increased with marginal significance in O2 ( χ 2 = 9.1, with post hoc FDR-corrected p = 0.078 for Pre–A3, A1–A2 and A2–A3), and FC5 ( χ 2 = 8.3, with post hoc tests of p > 0.195, FDR-corrected), indicating the extended sleepiness even after awakening.