Sociodemographic characteristics of young (<30) female compared to young male PWID in a cross-sectional study conducted in Poland, 2004–2005.

*in-patient = in-patient treatment facilities and programs; out-patient = community-based programs serving PWID and surrounding community.**may be in more than one category.* 住院治疗（in-patient）：指代住院治疗设施与相关项目；门诊治疗（out-patient）：指代为注射毒品使用者（People Who Inject Drugs，PWID）及周边社区提供服务的社区项目。** 可同时归属于多个类别。