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Table 2 Summary of HbA1c results from WB, capillary DBS and venous DBS samples

From: The use of dried blood spot sampling for the measurement of HbA1c: a cross-sectional study

Day Sample HbA1c (%, Mean ± SD) Intra-assay CV % (median, range)
D0 WB 6.22 ± 1.11 (N = 115) 1.19, 0–4.10
Uncorrected capDBS 6.62 ± 1.16 (N = 77) 2.28, 0–10.10
Corrected capDBS 6.39 ± 1.17 (N = 77) N/A
Uncorrected venDBS 6.72 ± 1.20 (N = 81) 1.68, 0–6.86
Corrected venDBS 6.42 ± 1.18 (N = 81) N/A
D4 Uncorrected capDBS 6.92 ± 1.32 (N = 96) 2.28, 0–9.87
Corrected capDBS 6.26 ± 1.18 (N = 96) N/A
Uncorrected venDBS 7.15 ± 1.39 (N = 81) 2.14, 0–11.79
Corrected venDBS 6.42 ± 1.21 (N = 81) N/A
D7 Uncorrected capDBS 6.85 ± 1.29 (N = 81) 1.98, 0–16.04
Corrected capDBS 6.25 ± 1.15 (N = 81) N/A
Uncorrected venDBS 7.36 ± 1.47 (N = 75) 2.81, 0–26.42
Corrected venDBS 6.51 ± 1.23 (N = 75) N/A
D14 Uncorrected capDBS 6.62 ± 1.44 (N = 79) 2.62, 0–17.68
Corrected capDBS 6.10 ± 1.33 (N = 79) N/A
Uncorrected venDBS 7.30 ± 1.65 (N = 79) 2.54, 0–26.52
Corrected venDBS 6.44 ± 1.29 (N = 79) N/A
  1. Note: WB = whole blood; ven = venous; cap = capillary; DBS = dried blood spot; SD = standard deviation; CV = coefficient of variation; N/A = not applicable