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Figure 1 | BMC Infectious Diseases

Figure 1

From: Opportunities to improve storage and transportation of blood specimens for CD4 testing in a rural district in Zimbabwe using BD vacutainer CD4 stabilization tubes: a stability and diagnostic accuracy study

Figure 1

Comparison of CD4 counts measured on ST (index test), at different time intervals, and EDTA at day 0 (reference test). A: box-and-whisker plots displaying the median and upper and lower quartiles. B and C: scatter plots displaying correlation. D and E: Bland-Altman plots showing the mean difference (solid line) and 95% lower limits of agreement (dotted lines). Blue vertical dashed lines indicate CD4 T cells thresholds of 350 cell/μL and 500 cells/μL.

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