External quality assessment to support the WHO ProSPeRo study for the evaluation of two dual HIV/syphilis point-of-care tests in seven countries

Table 3 EQA performance for each test type in laboratories

Laboratory	Total Sample tested	RPR		TP-PA/TP-HA		HIV
Laboratory	Total Sample tested	Qualitative Discordant	Quantitative Discordant	Qualitative Discordant	Quantitative Discordant^a	Qualitative Discordant
Lab1	5	1	0	0	1	0
Lab2	15	0	5	0	0	1
Lab3	15	1	3	0	5	3
Lab4	15	1	0	0	5	0
Lab5	15	0	0	0	3	0
Total	65	3	8	0	14	4
Agreement		95.4%	87.7%	100.0%	82.5%	93.8%
Kappa		0.91	0.76	1.00	0.46	0.90

^aSpecimen samples that did not have actual end-point titers or on which no testing occurred by lab were excluded from the % agreement and Kappa calculations

ISSN: 1471-2334