Table 4.

Factors influencing HIV seroconversion among serodiscordant couples: multivariable analysis from male index cases

Variable	RR	95.0% CI	P value
Sexual activity before diagnosis (once a month as control)
⩾3 times/week	3.172	0.750–13.409	0.117
1–2 times/week	7.317	2.400–22.304	<0.001
Semi-monthly	2.929	0.965–8.897	0.058
PVL at first visit (not detected* as control)
<300 copies/ml	0.150	0.055–0.407	<0.001
⩾300 copies/ml	0.294	0.057–1.516	0.144