Table 4.
Difference between readings using HemoCueTM and HCS, and accuracy of HCS at different cutoff levels of haemoglobin (n=501
| Parameter | Less than or equal to 12 g/dL | Less than or equal to 10 g/dL | Less than or equal to 7 g/dL |
|---|---|---|---|
| Sensitivity | 0.96 (CI 0.93-0.98) | 0.74 (CI 0.65-0.81) | 0.83 (CI 0.51-0.98) |
| Specificity | 0.22 (CI 0.15-0.3) | 0.84 (CI 0.8-0.87) | 0.99 (CI 0.97-0.98) |
| PPV | 0.75 (CI 0.71-0.79) | 0.56 (CI 0.47-0.64) | 0.71 (CI 0.43-0.9) |
| NPV | 0.69 (CI 0.53-0.81) | 0.92 (CI 0.89-0.95) | 0.99 (CI 0.98-1.0) |
| Likelihood ratio (positive) | 1.23 | 4.63 | 83 |
| Likelihood ratio (negative) | 0.18 | 0.31 | 0.17 |
| Efficiency | 75% | 82% | 99% |
| Correlation coefficient | 0.7 | 0.75 | 0.87 |