Substance use relapse rate low after transplant

Good news for alcoholics receiving liver transplants:

The average rate of alcohol relapse after transplantation was 5.6 cases per 100 patients per year, the researchers report in the medical journal Liver Transplantation, and the average rate of illicit drug relapse was 3.7 cases per 100 patients per year.

The only psychosocial factors affecting alcohol relapse were poor social support, a family history of alcohol abuse/dependence, and duration of abstinence before transplantation of 6 months or less.

The article doesn't address transplant screening methods. I'd imagine that all of the people who received a transplant had to at minimum offer some verbal commitment to abstinence.