HIV prevalences (%) and number of seropositives (n) and total sample size (N) from SIDA1/2/3 data used in fitting the model: FSW, clients and general population males and females.

NB Cluster sampling was used for FSW, based on the most recent FSW mapping and enumeration, with sex work sites being sampled with a probability proportional to size FSW[6]; clients were sampled at FSW venues using a similar cluster sampling methodology [25]; the studies in the general population involved two-stage cluster sampling of a representative sample of households [8], [26], [27].