Table 2 Baseline prevalence and incidence of infections*.

	Number tested	Number positive	Prevalence (%)	Person years of follow up	Incident cases	Incidence (per 100 person years)
HIV	636	59	9	1309	49	3.7
Hepatitis C	361	10	3	1395	7	0.5
Hepatitis B	797	155	19	N/A
Syphilis	748	16	21	1395	17	1.2
Gonorrhoea	748	68	9	1395	195	13.9
Chlamydia	748	56	7	1395	109	7.8

*See text for methods of calculating incidence.