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

From: 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

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
  1. N; Number tested; CI, confidence interval; LOA, limits of agreement