Pearson’s correlations were used to evaluate associations between the electrophysiological measures (i.e., time vs. time-frequency domain) separately for each group. For patients only, the clinical variables were also correlated with the electrophysiological measures. Given our a priori hypotheses about the direction of these associations (i.e., greater severity of symptoms coupled with reduced CSD amplitudes), one-tailed significance levels are reported for these analyses.