FIGURE 1.

A tree-based model for HIV among combined program environment injecting drug users: Risk Factors Study, New York City, 2005–2010.

Note. HSV-2 = herpes simplex virus type 2; IDU = injecting drug user; MSM = men who have sex with men. Non-White includes Black, Hispanic, and Other or mixed. Decimal value represent estimated HIV prevalence. Fractions represent the number of observed events (HIV seropositive IDUs) as the numerator and total number of observations (total number of IDUs) as the denominator.