Recovery and quality of like of heroin addicts after maintenance treatment with methadone

The current quality of life of 200 heroin addicts who started methadone maintenance treatment between 5 and 10 years ago will be evaluated, using the QOL.Q en de WHOQOL-100. Further, based on the EuropASI (addiction severity, related problems) and the MINI (psychopathology), the degree of recovery/chronicity and its associated factors will be assessed.