Table 4.

Sampling fractions and sample sizes for children of mothers with unknown HIV status to achieve target RSE's on pediatric prevalence based on the observed distributions of children and pediatric prevalence by mother's HIV status in phase 1 PHIA surveys

	Required sampling fractions and corresponding sample sizes for children of unknown HIV status mothers
Target RSEs on prevalence	Lesotho		Malawi		Namibia		Eswatini		Tanzania		Uganda		Zambia		Zimbabwe
	%	N	%	N	%	N	%	N	%	N	%	N	%	N	%	N
0.05	#	#	#	#	#	#	#	#	#	#	#	#	#	#	#	#
0.10	42%	1,618	41%	2,393	60%	4,206	29%	823	#	#	#	#	22%	1,430	40%	2,598
0.15	12%	474	12%	688	16%	1,145	9%	250	35%	2,686	35%	2,536	7%	442	12%	776
0.20	6%	238	6%	338	8%	560	4%	126	7%	570	15%	1,082	3%	222	6%	388
0.25	4%	145	4%	240	5%	337	3%	77	3%	253	9%	615	2%	135	4%	235
0.30	3%	98	2%	137	3%	227	2%	52	2%	148	6%	401	1%	92	2%	159
0.35	2%	71	2%	99	2%	163	1%	38	1%	99	4%	283	1%	66	2%	115
Number of children of deceased or HIV+ mothers to be tested	2,284		1,909		1,832		1,923		2,077		2,015		2,339		2,592

Note

^#indicates RSEs targets which cannot be achieved given the number of children in sampled households who could be tested in each PHIA country.