Prevalence of problem gambling among the prison population in Hamburg, Germany.

Despite the increasing research in gambling, the prevalence of problem gambling in the criminal justice population is rarely investigated, especially in Europe. Given the lack in knowledge the Hamburg study aimed at identifying the prevalence of problem gambling in the whole regional prison population. For this purpose two major approaches were used: a 10 months long-term screening of pre-trial detainees at prison entry through the Lie/Bet Questionnaire, and full-scale survey of inmate personnel records of prisoners being in prison on a defined reporting date.