highly significantP < 0.001
Results Relative EEG band power A three-way repeated-measures ANCOVA on relative EEG band power—controlling for age and including fixed subject intercepts to account for the non-independence of repeated measures—revealed a highly significant main effect of frequency band ( F (61 833) = 488.15, P < 0.001) but no overall EO versus EC effect ( F (11 833) = 0.00, P = 1.00) or global group difference between controls and TBI patients ( F (11 833) = 0.03, P = 0.87).