“…Despite methodological differences, eight variables were associated with dropping out of methadone maintenance programs in a majority of the studies that took them into account: age (Brown et al, 1972;Quatrone, 1973;Sells, Chatham, & Joe, 1972;, pretreatment employment status (Babst et al, 1971;Perkins, 1970;Perkins & Bloch, 1971;Rosenberg et al, 1972), education (Brown et al, 1972;Cusky et al, 1971;Quatrone, 1973;Sells, Chatham, & Joe, 1972), marital status (Babst et al, 1971;Brown et al, 1972;Perkins, 1970;Perkins & Bloch, 1971;, prior arrest record (Babst et al, 1971;Brown et al, 1972;Perkins, 1970;Perkins & Bloch, 1971;Quatrone, 1973), multiple drug abuse (Babst et al, 1971;Cusky et al, 1971;Sells, Chatham, & Joe, 1972;, dosage of methadone used (Brown et al, 1972;Goldstein & Judson, 1973;Perkins & Bloch, 1971;Rosenberg et al, 1972), and having made fewer previous treatment attempts (Brown et al, 1972;. Other variables that have been implicated include juvenile delinquency (Sells, Person, & Joe, 1972) and residential mobility (Sells, Chatham, & Joe, 1972), and various studies disagree about the prognostic value of whether a patient is involuntarily admitted to a program (Brown et al, 1972;Wieland &Novack, 1973).…”