In the present study, the BD and non-BD groups did not differ in terms of alpha power, which is not consistent with the results of previous studies that found reduced alpha power in patients with AUDs (Krauss and Niedermeyer, 1991; Enoch et al., 1995, 1999, 2003) and in binge drinkers (Correas et al., 2015). However, reduced alpha power was observed mainly in AUD patients with anxiety symptoms (Enoch et al., 1995, 1999, 2003) or family history of AUDs (Finn and Justus, 1999), indicating that reduced alpha power may be related to anxiety and/or genetic factors. Therefore, controlling for anxiety and the genetic effects of AUDs in this study likely contributed to the nonsignificant difference in alpha power between the BD and non-BD groups.
