Table 3.

Sensitivity analysis. Figures are cost (in $) per life year saved ($1.5=£1)

Detail	Formula recommended	Breast feed to 3 months	Breast feed to 6 months	Formula supplied	ACTG076	PETRA	CDC	CDC + formula recommended	CDC + formula supplied
Antenatal HIV seroprevalence (%):
0.1	34 319	35 175	161 533	24 183	4462	6983	5393	4608	4393
1	3 580	3 624	16 351	2 726	583	712	548	478	511
2	1 860	1 865	8 273	1 523	365	360	276	244	291
5	794	793	3 394	771	225	141	104	92	146
10	383	409	1 715	471	165	54	33	21	77
15	200	258	1 111	331	134	14	CS	CS	37
20	74	166	775	230	109	CS	CS	CS	4
30	CS	41	374	67	68	CS	CS	CS	CS
40	CS	CS	107	CS	30	CS	CS	CS	CS
Infant mortality (change relative to base rate):
0.25	129	146	380	92	132	14	CS	CS	25
0.5	147	168	469	121	133	14	CS	CS	28
1	200	258	1 111	331	134	14	CS	CS	37
2	701	DC	DC	DC	135	14	CS	CS	109
4	DC	DC	DC	DC	139	14	CS	DC	DC
Relative risk of death in non-breastfed, HIV negative children (change relative to base rate):
0.5	121	151	482	113	135	14	CS	CS	27
1	200	258	1 111	331	134	14	CS	CS	37
2	DC	DC	DC	DC	131	13	CS	CS	142
4	DC	DC	DC	DC	125	13	CS	DC	DC
Cost of antiretroviral drugs (change relative to base rate):
1	200	258	1 111	331	134	14	CS	CS	37
0.5	200	258	1 111	331	51	CS	CS	CS	CS
0.25	200	258	1 111	331	9	CS	CS	CS	CS
Expenditure on health services for HIV negative and positive children (change relative to base rate):
0.25	151	256	1 361	287	206	86	71	35	86
0.5	167	257	1 277	301	182	62	46	17	69
1	200	258	1 111	331	134	14	CS	CS	37
2	266	261	777	389	37	CS	CS	CS	CS
4	397	266	110	506	CS	CS	CS	CS	CS
Uptake of screening (proportion of women accepting):
0.25	DC	3 610	DC	6 935	182	92	59	35	129
0.5	518	506	DC	583	148	38	16	CS	62
0.75	253	308	1 877	379	137	20	3	CS	43
0.9	200	258	1 111	331	134	14	CS	CS	37
1	177	236	893	309	132	11	CS	CS	34

CS=cost saving. DC=net increase in deaths (death causing).