Psychosocial predictors of return to alcohol use after liver transplant: A multicenter cohort study

BackgroundAlcohol use after liver transplant (LT) is associated with higher rates of graft loss and increased mortality; however, there are limited data evaluating predictors of return to alcohol use using biochemical markers like phosphatidylethanol (PEth). MethodsThis multicenter retrospective cohort study evaluated psychosocial predictors of return to alcohol use using PEth testing in patients transplanted for alcohol-associated liver disease (ALD). The study included 223 patients at three centers who had received a LT for ALD and had at least one PEth measurement post-LT. ResultsThe rate of return to alcohol use was 6.9 cases per 100 person-years (26 patients total) over a median 555days of follow-up after transplant. Younger age (HR 0.96; 95% CI 0.92-0.99, p=0.02), mental health comorbidities (HR 2.83; 95% CI 1.25-6.39, p=0.01), and non-Hispanic White race (HR 3.79; 95% CI 1.42-10.15, p=0.01) were associated with return to alcohol use post-LT. There was no difference between post-LT return to alcohol use rates or short-term survival among patients with less than 6months of sobriety prior to listing compared with those with more than 6months. Patients with sustained alcohol use post-LT had increased odds of history of illicit substance use (OR 5.20; 95% CI 1.01-26.83, p=0.04) but no significant difference in time from the last drink to listing (OR 1.03; 95% CI 0.18-5.80, p=0.97). ConclusionsThese findings emphasize the importance of mental health comorbidities rather than period of sobriety in predicting post-LT return to alcohol use. Furthermore, the higher risk of return to alcohol use in non-Hispanic White patients suggests a potential disparity with referral and selection of higher risk White patients.