Difference in cognitive function by first onset age of alcohol induced blackout and its duration
Eun-Jeong Min 1, Sung-Gon Kim 1, 2*, Jin-Seong Lee 1, 2, Bia Seo 1, Woo-Young Jung 1, Sung-Young Huh 1, Ji-Hun Park 3, Chang-Hee Hong 4, Hee Jung Yu 5
1Department of Psychiatry, Pusan National University Yangsan Hospital, 2Department of Psychiatry, School of Medicine, Pusan National University, 3Park Ji Hun neuropsychiatry, 4Department of Psychology, Pusan National University, 5Department of Social Welfare & Counseling, Catholic University of Pusan
Received: December 24, 2018; Revised: April 29, 2019; Accepted: May 1, 2019; Published online: May 1, 2019.
© The Korean College of Neuropsychopharmacology. All rights reserved.

Abstract
Objective: Alcohol-induced blackout (blackout) is a typical early symptom of cognitive impairment caused by drinking. However, the first onset age of blackout or the duration after onset of blackout has not been directly compared in previous studies. The purpose of this study was to investigate the differences in cognitive function to the first start age of alcohol-induced blackouts and their duration.
Methods: Thirty-one male subjects at Hospital and Community Center were included in this study. Their age at the first blackout and the duration after the onset of blackout were investigated. Neuropsychological tests were conducted to determine their attention, memory, and executive function. Subjects were divided into three groups according to their age of the first onset blackout (group O1, < 20 years; group O2, 21–39 years; and group O3, > 40 years). Subjects were also divided into three groups by duration after the onset of blackout (P1, < 10 years; P2, 10–29 years; and P3, > 30 years). We then examined differences in neurocognitive function among these groups.
Results: O1 tended to have a lower memory score than O2 (F=3.28, p=.053). Significant differences were observed in attention and executive function between groups P1 and P3 (Digit span_backward F=6.07, p<.05, visual span_forward F=4.19, p<.05, EIQ F=3.55, p<.05).
Conclusion: Greater memory impairment was detected in subjects having an earlier age of the first blackout. The longer the duration after the onset of blackout, the more impaired their attention and executive function skills.
Keywords: alcohol-induced blackout, onset age of a blackout, duration after onset of blackout, cognitive function, addiction psychiatry


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