Alcohol use disorders after bariatric surgery: a study using linked health claims and survey data.

Background: Previous studies have repeatedly reported alcohol use disorders (AUDs) in patients after bariatric surgery (BS). This research field can benefit from studies combining health claims data with survey data.

Methods: Based on a combined retrospective cohort and cross-sectional study, 2151 patients with BS identified in a large health claims database received a questionnaire, by which we assessed the presence of AUDs based on a validated instrument (AUDIT) as well as by ICD-10 codes from the health claims data. We described patients with vs. without AUDs regarding sex, time since surgery, satisfaction with weight loss and health care resource utilization (HCRU).

Results: The majority of patients were female (80.7%) with a median time since surgery of 6 years (Interquartile range: 4-9 years). For the majority of patients, the bariatric intervention was either a RYGB-Bypass (50%) or sleeve gastrectomy (43%). Overall, 3% had at least one AUD diagnosis code in the claims data (men: 5.5%, women: 2.5%). Among men, 43.6% of diagnoses were coded after but not before the surgery (women: 52%). According to AUDIT (completed by 1496 patients), 9.4% of all patients showed at least hazardous/harmful alcohol consumption. Higher scores were associated with sex of the person, longer time since surgery, dissatisfaction with the weight loss and higher HCRU, with contradicting results regarding psychotherapeutic care.

Conclusions: The proportion with AUDs in the study population gives rise to concern as alcohol consumption should be restricted after BS. The results suggest the necessity for close monitoring and post-surgical care.