Table 2 HIV RNA (log₁₀ scale) as a mixture of two normal distributions*.

Years from HAART initiation	Men					Women
	Number of person visits	Lower component		Higher component		Number of person visits	Lower component		Higher component
		%	Median (copies/ml)	%	Median (copies/ml)		%	Median (copies/ml)	%	Median (copies/ml)
⩾−1 and <0	970	10	55	90	30153	2049	22	192	78	31384
⩾0 and <1	922	52	19	48	3868	1834	38	9	62	6823
⩾1 and <2	854	58	10	42	7865	1406	43	12	57	6516
⩾2 and <3	759	64	10	36	8111	1260	47	13	53	7367
⩾3 and <4	667	65	4	35	5067	1181	49	7	51	6326
⩾4 and <5	613	68	6	32	5247	945	56	17	44	9253

*Observations below the limit of detection (LD) handled as censored. The two component model with equal variance fitted the log₁₀ HIV RNA significantly (p<0.005) better than the one component model for each time period in both cohorts.