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Alcohol Use Thresholds for Identifying Alcohol-related Problems Before and Following Roux-en-Y Gastric Bypass

White, Gretchen E., PhD*,†; Courcoulas, Anita P., MD; Richardson, Gale A., PhD*,‡; Mair, Christina, PhD§; King, Wendy C., PhD*

doi: 10.1097/SLA.0000000000003078
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Objective: The aim of this study was to determine the sensitivity and specificity of potential thresholds of alcohol use for identifying alcohol-related problems in women post-Roux-en-Y gastric bypass (RYGB).

Background: Despite evidence that RYGB alters alcohol pharmacokinetics and is associated with an increased risk for alcohol-related problems, the level of alcohol use that should prompt further screening for alcohol-related problems following RYGB is unclear.

Methods: The Longitudinal Assessment of Bariatric Surgery-2 is a prospective cohort study. Before surgery and annually for ≤7 years following surgery, participants completed the 10-item Alcohol Use Disorder Identification Test (AUDIT), which assesses past-year frequency and quantity of alcohol, frequency of consuming ≥6 drinks, and alcohol-related problems (ie, symptoms of alcohol dependence and/or alcohol-related harm). The AUDIT-Consumption (AUDIT-C) score was determined from the first 3 AUDIT items.

Results: Post-RYGB, 835 women reported current drinking at 1 or more annual assessment(s). Compared with higher frequency thresholds, drinking ≥2 times/month had the highest combined sensitivity (85.3%) and specificity (61.4%) for identifying alcohol-related problems. Compared with higher quantity thresholds, drinking ≥3 drinks/drinking day had the highest combined sensitivity (64.2%) and specificity (87.2%). An AUDIT-C score ≥3, versus other thresholds, had the highest combined sensitivity (76.4%) and specificity (81.6%).

Conclusion: The sensitivity and specificity of these thresholds indicate assessment of alcohol consumption alone may be inadequate for identifying women at risk for alcohol-related problems post-RYGB. Additional screening tools for alcohol-related problems, which assess symptoms of alcohol-related problems, should be conducted in this population.

*Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA

Department of Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA

Department of Psychiatry, School of Medicine, University of Pittsburgh, Pittsburgh, PA

§Department of Behavioral and Community Health Sciences, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA.

Reprints: Wendy C. King, PhD, 4420 Bayard Street, Suite 600, Pittsburgh, PA 15260. E-mail: kingw@edc.pitt.edu.

The Longitudinal Assessment of Bariatric Surgery-2 was funded by a cooperative agreement by the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Grant numbers included Data Coordinating Center -U01 DK066557; Columbia-Presbyterian - U01-DK66667 (in collaboration with Cornell University Medical Center CTSC, Grant UL1-RR024996); University of Washington - U01-DK66568 (in collaboration with CTRC, Grant M01RR-00037); Neuropsychiatric Research Institute - U01-DK66471; East Carolina University – U01-DK66526; University of Pittsburgh Medical Center – U01-DK66585 (in collaboration with CTRC, Grant UL1-RR024153); Oregon Health & Science University – U01-DK66555.

The authors declare no conflict of interests.

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