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Table 2 Difference in Hb readings (mean, 95% CI) between autoanalyzer (reference) and index tests in different categories of anemia

From: Diagnostic accuracy of point-of-care devices for detection of anemia in community settings in India

Type of device

Device

All readings (Hb 2–20 g/dl)

Moderate and severe anemia (Hb < 10 g/dl)

Severe anemia (Hb < 7 g/dl)

Invasive devices

Hemocue (venous)

0.47 (0.42 to 0.52)

0.82 (0.71 to 0.92)

0.92 (0.81 to 1.02)

Hemocue (capillary)

0.18 (0.11 to 0.25)

0.70 (0.58 to 0.82)

0.84 (0.66 to 1.03)

True Hb (venous)

−0.28(− 0.36 to 0.20)

−0.23(− 0.41 to − 0.04)

0.05(− 0.52 to 0.63)

True Hb (capillary)

−0.22(− 0.35 to − 0.09)

−0.23(− 0.43 to − 0.03)

−0.06(− 0.71 to 0.58)

Non invasive devices

Massimo (technician)

0.06(−0.10 to 0.24)

1.7 (1.55 to 1.97)

−0.39(−1.37 to 0.57)

Massimo (ANM)

0.47 (0.37 to 0.58)

1.7 (1.56 to 1.98)

1.10 (0.20 to 1.99)

AJO (technician)

0.43 (0.17 to 0.69)

2.6 (2.07 to 3.2)

3.84 (2.62 to 5.06)

AJO (ANM)

0.71 (0.46 to 0.96)

2.5 (1.88 to 3.12)

4.1 (2.6 to 5.6)