Affordable flow cytometry for enumeration of absolute CD4+ T-lymphocytes to identify subtype C HIV-1 infected adults requiring antiretroviral therapy (ART) and monitoring response to ART in a resource-limited setting

Table 2 Bland-Altman analysis comparison of Cyflow versus FACSCount absolute CD4⁺ T-lymphocyte counts

Range of CD4⁺ T-lymphocyte counts	N	Positive and negative LOA (cells/μL)	Mean difference (bias)	95% CI of the mean
0–1200 CD4⁺ cells/μL (All)	150	42 to -40	1.21	-2.1 to 3.3
0–250 CD4⁺ cells/μL	40	27 to -21	2.6	-1.1 to 6.3
251–500 CD4⁺ cells/μL	69	40 to -38	0.96	-3.7 to 5.6
501–1200 CD4⁺ cells/μL	41	55 to -55	0.29	-8.1 to 8.7

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