Figure 1From: Mobility, risk behavior and HIV/STI rates among female sex workers in Kaiyuan City, Yunnan Province, China Overall follow-up rate by month and stratified by HIV sero-positivity and drug using for the 270 female sex workers included in the follow-up study. The follow-up rate of HIV-positive subjects was significant lower than that of HIV-negative subjects (P = 0.045), and the follow-up rate of illegal drug users was significant lower than that of non-drug users (P = 0.012).Back to article page