For the study, Wendy King of the University of Pittsburgh and colleagues followed nearly 2,000 patients who had undergone a weight-loss procedure, including gastric bypass surgery and gastric banding, in which a silicone band is placed around the top portion of the stomach to restrict food intake.
People in the study answered questions about their drinking habits before surgery and again one and/or two years later. The team then rated the alcohol use on a scale developed by the World Health Organization to measure alcohol use disorders.
Before surgery, 7.6 percent of the patients had drinking problems, but two years after surgery, it had increased to 9.6 percent.
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