The clients (17%) who left early had a trend toward being female, not being from the Caribbean, and were significantly less likely to use alcohol, more likely to use opioids and more likely to use prescribed mental health medications. The Caribbean subset of clients leaving early had a trend toward being younger and having prior treatment. They were significantly more likely to be female, with fewer years of drug use, and were more likely to be taking prescribed mental health medications.

The status of addictive drug use in 100 persons from Antigua with addiction admitted for residential treatment was assessed at an average of 21 months following treatment. Abstinence was achieved in 46% of those entering treatment, in 51% completing treatment, in 60% in those whose families participated and in 92% of those accepting halfway house placement.