Information on four groups of variables were collected using a self-administered questionnaire: socio-demographic characteristics, drinking characteristics, driving characteristics, and psychosocial characteristics. Subjects were subdivided into three groups; those with zero DWI arrests; one DWI arrest, and multiple DWI arrests. The results of bivariate analyses showed that while Groups zero and one were very similar to each other, those in Group two differed significantly from at least one of the other two groups for about half of the variables studied. A multivariate discriminant analysis demonstrated that there were no important differences between people with zero and one DWI arrests, as people with one arrest were usually classified as having zero arrests. 3 tables and 39 references. (Author abstract)