associated factors among female sex workers (FSW) in Iran. Methods We analyzed data
from a bio-behavioral surveillance survey of 1347 FSW across 13 major cities in Iran in
2015. Two outcome measures were defined: i) past-month “any drug use”, a binary variable
defined as none or any; and ii) a three-category past-month “poly-drug use” variable defined
as none, only one drug, and more than one drug. Correlates of these two study outcomes …