Table 2. Accuracy of hemoglobin assessment devices compared to reference hemoglobin.
| Hgb Assessment | N (289) | Mean (SD) (g/dL) | Range (g/dL) | % Anemica | Mean Difference (SD) with reference Hgb (g/dL)b | Upper and Lower Levels of Agreement | Clinically acceptable performance, % (+/-1.0 g/dL)c |
|---|---|---|---|---|---|---|---|
| Apple® Phone | 289 | 12.0 (1.4) | 7.2–16.7 | 53.3% | -1.6 (2.0)* | -5.6, 2.4 | 31.5% |
| Android® Phone | 289 | 12.9 (1.6) | 8.2–16.8 | 32.9% | -0.7 (2.0)* | -4.7, 3.3 | 34.6% |
| Masimo Pronto® | 286 | 13.3 (1.5) | 9.3–16.9 | 18.3% | -0.4 (1.6)* | -3.7, 2.8 | 49.5% |
| HemoCue® Hb-301 | 287 | 14.0 (1.9) | 6.6–18.3 | 8.7% | 0.4 (0.7)* | -1.0, 1.8 | 90.3% |
| HemoCue® Hb-801 | 288 | 13.9 (1.8) | 6.3–17.9 | 10.4% | 0.2 (0.6)* | -1.1, 1.5 | 93.4% |
| Reference Hgbc | 289 | 13.7 (1.8) | 5.9–18.4 | 12.5% | Ref. | Ref. | Ref. |
a Based off WHO cutoffs per age and sex for any level of anemia: children < 5y: <11.0 g/dL; children 5-11y: <11.5 g/dL; children 12-14y & Women (non-pregnant) ≥ 15y: <12.0 g/dL; men ≥15y: <13.0 g/dL.
b Significant difference from reference Hgb reference (H0 = 0 and α = 0.05) *p< 0.0001.
C Clinically acceptable performance defined as percentage of values within ± 1 g/dL of reference Hgb.