Table 1

Comparisons of scale and reference measurements

Initial reading
Reference (g/dl)Colour scale (g/dl)Correct*Incorrect* Repeat reading Incorrect*
*Compared with reference measurements.
12 or more12–1427419 (6.5%)4 (1.4%)
≥11≥1133133 (9.1%)12 (3.3%)
10 or 1110 or 118629 (25.2%)10 (8.7%)
8 or 98 or 97214 (12.8%)9 (4.7%)
6–86–86618 (21.4%)14 (6.7%)
≤64–6357 (16.7%)1 (2.4%)