The paucity of research on the treatment needs of women with substance abuse problems has been a serious impediment to the development of empirically validated treatment programmes. Women continue to be seriously under-represented as research subjects and clients of treatment services. This study compares the characteristics of 80 women attending a specialist women's treatment service with those of eighty women attending two traditional mixed-sex treatment agencies. Women attending a gender-sensitive service were significantly more likely to have dependent children, to be lesbian, to have a maternal history for drug or alcohol problems and to have suffered sexual abuse in childhood. These results suggest that gender-sensitive treatment services may be recruiting women who might not otherwise have sought treatment for their substance dependence problems.