“…[13][14][15] Studies among out-of-treatment users are less common, 7,14 as are those comparing users to their nonusing counterparts. 5,13,16,17 Determinants of health, the need for health care, and access to care all have been shown to differ according to age, gender, racial or ethnic background, socio-economic status, geographic location, and various enabling conditions. [18][19][20][21][22][23][24][25][26][27][28] In this article, we address those factors that have traditionally been associated with health care utilization in previous studies, but also examine the independent and interrelated contribution of age and drug use to utilization of services among a group of potentially underserved women.…”