1 compared to Group 4, with the sixth characteristic similar to Group 3 in that it involved an externalizing questionnaire score. The regression relating to Group 2 (SUD only) from among Groups 2 plus 4 had contributions from three items: a higher score on an externalizing questionnaire; one alcohol, and one drug item (but not LR). All three types of items also related to Group 1 membership, but with a different externalizing questionnaire score. Thus, five of the eight items that contributed to the regression for Group 1 versus Group 4, also related to Group 2 and/or Group 3, with one of the additional items relating to an externalizing score from a different questionnaire. Similar results for these three regressions were seen if hierarchical logistic regressions were used focusing on blocks of demographic items, alcohol and drug use items, and then LR and externalizing items, with the exception that the equation relating to the block of externalizing characteristics and LR regarding the small Group 2 was a trend (p = .081).
