Estimating size of male sub-population at high risk for HIV/AIDS by multiplier method

  Objective   To explore effective methods by estimating the size of clients of female sex workers in present China.

  Methods   Contacted subjects by several approaches including female sex workers volunteers, STD clinics, long-distance bus stat ions, building site, long-distance freighting station and adopting nomination methods, and applied multiplier method to estimate the size of clients of female sex workers in Leshan downtown district.

  Results   The size of clients of female sex workers calculated in Leshan downtown district was 25 926-29 863 and frequency of sexual intercourse was 15.39 per year.

  Conclusion   The ways to contact subjects effectively and to ensure sampler epresentative were sex workers volunteers, longdistance bus stations and adopting snowballing methods. Applying multiplier method could calculate the size of the clients simply and quickly.