Table 1.

Number of events and sample size according to potential efficacy rates in both arms

		HIV transmission in 3TC arm
		0.03	0.04	0.05
HIV transmission in LPV/r arm	0.01	1428 subjects	682 subjects	430 subjects
		27 events	16 events	12 events
	0.015	3190 subjects	1223 subjects	704 subjects
		67 events	32 events	22 events
	0.02		2204 subjects	1118 subjects
			63 events	37 events
	0.025			1800 subjects
				64 events