This study examined the validity of classifying substance abusers based on temperament and @entity734 severity, and expanded the scope of typology differences to proximal determinants of use (e.g., expectancies, motives). @entity1 were interviewed about substance use, @entity308 , and family history of @entity167 and @entity734 . Self-report instruments measuring temperament, expectancies, and motives were completed. @entity1 were 147 male veterans admitted to inpatient substance abuse treatment at a U.S. Department of Veterans Affairs medical center. Cluster analysis identified four types of users with two high substance problem severity and two low substance problem severity groups. Two, high problem severity, early onset groups differed only on the cluster variable of negative affectivity (NA), but showed differences on antisocial personality characteristics, @entity16251 , and coping motives for @entity167 . The two low problem severity groups were distinguished by age of onset and positive affectivity (PA). The late onset, low PA group had a higher incidence of @entity308 , a greater tendency to use substances in solitary contexts, and lower enhancement motives for @entity167 compared to the early onset, high PA cluster. The four-cluster solution yielded more distinctions on external criteria than the two-cluster solution. Such temperament variation within both high and low severity substance abusers may be important for treatment planning.

A classification of substance-dependent XXXX on temperament and severity variables.

@entity1 :: ('9606', 'Species') :: ['Patients', 'Participants'] @entity308 :: ('MESH:D003866', 'Disease') :: ['depression'] @entity167 :: ('CHEBI:16236', 'Chemical') :: ['alcohol'] @entity734 :: ('MESH:D019966', 'Disease') :: ['dependence', 'drug abuse'] @entity16251 :: ('MESH:D006998', 'Disease') :: ['hypochondriasis']
@entity1 :: (9606,Species) :: ['men']
