Social stigma and taboo limit current understanding of sexual behaviours an
d epidemiology of sexually transmitted infections (STIs) in clients of comm
ercial sex workers/prostitutes. We designed a study to determine risk behav
iours and prevalence of STIs in a group of sexual health clinic attending m
ale clients of female commercial sex workers (FCSWs) in Sydney, and to comp
are these characteristics with men who denied any commercial sexual contact
. Eight hundred and ninety cases and 2670 controls were included. Clients o
f FCSWs were older, more likely to be married and of non-English speaking b
ackground than controls. Clients had more sexual partners but reported more
condom usage than controls. Prevalence of STIs at presentation was lower i
n clients than controls but clients were more likely to report STIs in the
past than controls. HIV prevalence was low in both groups.