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Sensitivity and specificity of the Veggie Meter in measuring skin carotenoid status using serum retinol concentrations as the reference standard in detecting severe vitamin A deficiency
| n | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | |
|---|---|---|---|---|---|
| Pregnant women | 164 | 57.1 | 82.7 | 23.5 | 95.4 |
| Children | 162 | 61.9 | 75.9 | 27.7 | 93.0 |
| Combined | 326 | 60.0 | 79.4 | 25.9 | 94.3 |
NPV, negative predictive value; PPV, positive predictive value.
