Volume 42, Issue 2 pp. 387-396
Original Article

Validation of Alcohol Flushing Questionnaires in Determining Inactive Aldehyde Dehydrogenase-2 and Its Clinical Implication in Alcohol-Related Diseases

Cheol Min Shin

Cheol Min Shin

Department of Internal Medicine, Seoul National University Bundang Hospital, Seoungnam, Gyeonggi-do, Korea

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Nayoung Kim

Corresponding Author

Nayoung Kim

Department of Internal Medicine, Seoul National University Bundang Hospital, Seoungnam, Gyeonggi-do, Korea

Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea

Reprint requests: Nayoung Kim, MD, PhD, Department of Internal Medicine, Seoul National University Bundang Hospital, 173-82, Gumi-ro, Bundang-gu, Seongnam, Gyeonggi-do 463-707, Korea; Tel.: + 82-31-787-7008; Fax: + 82-31-787-4051; E-mail: [email protected]

and

Sung-Il Cho, MD, ScD, Professor of Epidemiology, Graduate School of Public Health, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea; Tel.: +82-2-880-2717 (O), 82-10-3477-8868 (M); Fax: +1-82-2-743-8240; E-mails: [email protected], [email protected]

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Sung-Il Cho

Corresponding Author

Sung-Il Cho

School of Public Health and Institute of Health and Environment, Seoul National University, Seoul, Korea

Reprint requests: Nayoung Kim, MD, PhD, Department of Internal Medicine, Seoul National University Bundang Hospital, 173-82, Gumi-ro, Bundang-gu, Seongnam, Gyeonggi-do 463-707, Korea; Tel.: + 82-31-787-7008; Fax: + 82-31-787-4051; E-mail: [email protected]

and

Sung-Il Cho, MD, ScD, Professor of Epidemiology, Graduate School of Public Health, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea; Tel.: +82-2-880-2717 (O), 82-10-3477-8868 (M); Fax: +1-82-2-743-8240; E-mails: [email protected], [email protected]

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Joohon Sung

Joohon Sung

School of Public Health and Institute of Health and Environment, Seoul National University, Seoul, Korea

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Hee-Jung Lee

Hee-Jung Lee

Incheon Research Institute of Public Health and Environment , Incheon, Korea

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First published: 05 December 2017
Citations: 19

Abstract

Background

Our aim was to validate alcohol flushing questionnaires in detecting inactive ALDH2 (ALDH2*1/*2 or ALDH2*2/*2).

Methods

Two study sets were established; in study set 1, 210 healthy male subjects (age 22 to 59 years) were enrolled; in study set 2, 756 subjects were enrolled who received esophagogastroduodenoscopy to evaluate their dyspeptic symptoms or as part of a gastric cancer screening program. Subjects in study sets 1 and 2 completed the modified alcohol flushing questionnaires of Yokoyama and colleagues (1997, 2003). Polymerase chain reaction–restriction fragment length polymorphism method was used to determine ALDH2 genotype.

Results

In study set 1, 29.0% (61 of 210) had inactive ALDH2. The sensitivity and specificity of the modified alcohol flushing questionnaire for detecting inactive ALDH2 were 95.1 and 76.5%, respectively. Drinking problems negatively correlated with positive alcohol flushing response and inactive ALDH2 (all p-values < 0.05). In study set 2, the sensitivity and specificity of the alcohol flushing questionnaire for detecting inactive ALDH2 were 78.9 and 82.1%, respectively. Interestingly, drinking ≥7 units/wk in men or ≥3.5 units/wk in women significantly increased the risk of benign gastric ulcer (BGU) among positive alcohol flushers (odds ratio, 8.97; 95% confidence interval, 1.38 to 58.30), but not among negative alcohol flushers.

Conclusions

Simple flushing questionnaires may be administered to the Korean population as a screening tool in detecting individuals who carry inactive ALDH2. Alcohol flushing response negatively correlates with drinking problems and can modify the risk for BGU by alcohol intake.

Graphical Abstract

Amount of alcohol intake with regard to ALDH2 genotype (A) and the alcohol flushing response (B): All subjects with ALDH2*2/*2 were light drinkers with an average alcohol intake <4 units per week, but heterozygotes (ALDH2*1/*2) had a wider range of alcohol intake from 0 to 64 units per week (A). In addition, alcohol flushing evaluated by flushing questionnaire negatively correlated with alcohol intake (B). Data were presented as mean and standard deviation. One unit equals 14 g of ethanol.

Conflict of Interest

No author has any conflict of interest or financial arrangement that could potentially influence the presented research.

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