RESUMEN
OBJECTIVES: Liver transplantation for alcoholic liver disease (ALD) can be complicated by abusive or "problem" drinking (PD) after transplant. There are limited data for evaluating the effect of pre-transplant abstinence on post-transplant PD. Few existing studies have included a substantial number of patients with co-existing causes of hepatic dysfunction, and the effect of PD on survival in recent European studies has been controversial. We hypothesized that a longer duration of pre-transplant abstinence would lead to less PD after transplantation. Accordingly, the objectives of this study are to analyze a North American cohort of patients with ALD with or without a secondary diagnosis of liver disease to estimate (i) the incidence of PD and its predictors, as well as (ii) the effect of PD on patient survival. METHODS: We conducted a retrospective review of all patients transplanted for ALD surviving for more than 3 months after transplant. PD was defined as either any drinking (AD) to the point of intoxication or drinking above the toxic threshold (>20 g/day in women and >40 g/day in men) on at least two separate occasions. We used Cox's proportional hazards regression to estimate risk ratios and Kaplan-Meier curves with log-rank analysis to compare survival. RESULTS: Of 213 eligible transplant patients, 42 were excluded. Of the 171 remaining patients, 78% were male; mean age was 52 years. Overall 53% of patients had co-existing causes of liver dysfunction. The mean follow-up was 64.8 months. The median pre-transplant abstinence was 19 months. In all patients, the risk of AD was 24% and PD 13%. Pre-transplant abstinence duration was the only independent predictor of PD after transplant. For every 1-month increment in pre-transplant abstinence, there was a 5% decrease in the adjusted relapse rate. There was no survival difference noted between problem drinkers and non-drinkers. CONCLUSIONS: The risk of PD decreased with increasing pre-transplant abstinence. Our data support pre-transplant abstinence as an important predictor of post-transplant recidivism; however, the optimal period of abstinence remains unclear. Patients with <18 months of abstinence may benefit from more intensive follow-up and rehabilitation after transplant.