Demographic and clinical characteristics of study participants.

HIV-negative, healthy controls (HIV-, N = 61), HIV-positive individuals without cocaine use (HIV+Coc-, N = 37), and HIV-positive individuals with reported cocaine use within the previous one year (HIV+Coc+, N = 16) were enrolled in the study. All HIV-positive individuals were on antiretroviral therapy at the time of the blood draw. Unless otherwise stated, N indicates sample number with percentage of total sample group in parentheses. NA indicates not applicable. Demographic and clinical characteristics of study participants.