Table 2.

Agreement between point-of-care rapid test and laboratory-based immunoassay testing, the 2017 Antenatal Sentinel HIV Survey, South Africa.

	National			Eastern Cape			Free State			Gauteng			KwaZulu Natal
	Laboratory-based testing
POC testing	HIV+	HIV−	Total	HIV+	HIV−	Total	HIV+	HIV−	Total	HIV+	HIV−	Total	HIV+	HIV−	Total
HIV+	9,677	84	9,761	1,254	7	1,261	849	4	853	1,463	6	1,469	3,270	28	3,298
HIV−	364	21,623	21,987	69	2638	2,707	24	1,806	1,830	49	3,184	3,233	56	4,754	4,810
Total	10,041	21,707	31,748	1,323	2,645	3,968	873	1,810	2,683	1,512	3,190	4,702	3,326	4,782	8,108
	PPA = 96.3% (95% CI: 95.9%–96.6%)			PPA = 94.8% (95% CI: 93.7%–95.7%)			PPA = 97.3% (95% CI: 96.3%–98.0%)			PPA = 96.8% (95% CI: 95.3%–97.5%)			PPA = 98.3% (95% CI: 97.9%–98.7%)
	NPA = 99.7% (95% CI: 99.6–99.7%)			NPA = 99.7% (95% CI: 99.5%–99.9%)			NPA = 99.8% (95% CI: 99.6%–99.9%)			NPA = 99.8% (95% CI: 99.6%–99.9%)			NPA = 99.4% (95% CI: 99.2%–99.6%)
	Limpopo			Mpumalanga			Northern Cape			North West			Western Cape
	Laboratory-based testing
POC testing	HIV+	HIV−	Total	HIV+	HIV−	Total	HIV+	HIV−	Total	HIV+	HIV−	Total	HIV+	HIV−	Total
HIV+	537	13	550	985	5	990	247	3	250	543	12	555	529	6	535
HIV−	33	1,856	1,889	65	1,748	1,813	19	1,228	1,247	27	1,453	1,480	22	2,956	2,978
Total	570	1,869	2,439	1,050	1,753	2,803	266	1,231	1,497	570	1,465	2,035	551	2,962	3,513
	PPA = 94.2% (95% CI: 92.5%–95.6%)			PPA = 93.8% (95% CI: 92.4%–95.0%)			PPA = 92.9% (95% CI: 89.8%–95.1%)			PPA = 95.3% (95% CI: 93.4%–96.6%)			PPA = 96.0% (95% CI: 94.3%–97.2%)
	NPA = 99.3% (95% CI: 98.9%–99.5%)			NPA = 99.7% (95% CI: 99.2%–99.9%)			NPA = 99.8% (95% CI: 99.4%–99.9%)			NPA = 99.2% (95% CI: 98.5%–99.5%)			NPA = 99.8% (95% CI: 99.7%–99.9%)

Percent agreement weighted.