Univariate ANCOVA models revealed that relative to controls alcoholics had significantly lower Cz δ total power (F(1,30) = 13.61, p = 0.002; Fig. 2). Cz δ total power was significantly correlated with P3 amplitude at Cz (r = 0.332, p = 0.030). Stepwise multiple regression analysis to evaluate the relations between Cz δ total power and regional DTI measures indicated lower δ power correlated with higher λT in the cingulate bundle (r = −0.473, p = 0.006, right panel of Fig. 3) Exploration of values from the left and right cingulate bundles separately revealed significant correlations between Cz δ total and λT in both the left (r = −0.439, p = 0.006) and the right (r = −0.470, p = 0.003) bundles.
