Validation of the criteria for DSM diagnosis of cocaine abuse and cocaine dependence.

The concurrent external validity of the diagnosis of cocaine abuse, based on the DSM criteria, is shown to be established to an unexpectedly high degree, based on a method of determining the association between a summary score derived by quantifying the DSM criteria and another summary score derived from weighting several measures of frequency of use of cocaine and a measure of its mode of use. The degree of validity was cross-validated by performing the same analysis on two study samples: one of inpatients (N = 179) and one of urban-community African-Americans (N = 204).