Obstetric medication versus residential area as perinatal risk factors for subsequent adult drug addiction in offspring

Two possible risk factors for drug addiction were weighed against each other: perinatal factors and risk factors associated with the phenomenon of 'contagious' transmission of drug addiction in certain residential areas during adolescence. According to this matched case control study of 200 amphetamine addicts and 200 opiate addicts, the fact of being born in certain hospitals was a risk factor for becoming drug addicted. The variable residential area has not been able to explain the uneven distribution of drug abusers.