Table 3. Cutoff points and sensitivity/specificity of the prediction scores for food allergy and anaphylaxis in the validation dataset.
| Factor | Subjects | Food allergy | Anaphylaxis | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | |||
| Prediction score | ||||||||||
| 1 | 16,312 | 97.7 | 13.4 | 10.0 | 98.3 | 97.0 | 12.4 | 0.40 | 99.9 | |
| 3 | 11,004 | 87.6 | 43.7 | 13.3 | 97.3 | 86.6 | 41.0 | 0.53 | 99.9 | |
| 8 | 7,439 | 76.7 | 63.7 | 17.3 | 96.5 | 73.1 | 60.2 | 0.66 | 99.8 | |
| 9 | 6,495 | 70.1 | 68.6 | 18.1 | 95.9 | 70.2 | 65.3 | 0.72 | 99.8 | |
| 10 | 4,723 | 55.6 | 77.6 | 19.7 | 94.7 | 58.2 | 74.8 | 0.83 | 99.8 | |
| 11 | 3,289 | 43.0 | 84.9 | 21.9 | 93.8 | 47.8 | 82.4 | 0.97 | 99.8 | |
| 12 | 1,711 | 26.7 | 92.5 | 26.1 | 92.7 | 32.8 | 90.9 | 1.29 | 99.7 | |
| 13 | 864 | 15.5 | 96.4 | 30.1 | 92.0 | 25.4 | 95.4 | 1.97 | 99.7 | |
| 14 | 557 | 10.5 | 97.8 | 31.6 | 91.7 | 20.9 | 97.1 | 2.51 | 99.7 | |
| 15 | 265 | 5.4 | 99.0 | 34.3 | 91.4 | 14.9 | 98.6 | 3.77 | 99.7 | |
| 16 | 84 | 2.2 | 99.7 | 44.0 | 91.2 | 7.5 | 99.6 | 5.95 | 99.7 | |
| Eczema | 7,400 | 76.5 | 63.9 | 17.3 | 96.5 | 73.1 | 60.4 | 0.66 | 99.8 | |
| Eczema with itch | 5,495 | 65.0 | 73.7 | 19.5 | 95.5 | 72.7 | 70.4 | 0.87 | 99.9 | |
Sensitivity/specificity of “eczema” and “eczema with itch” are also shown.
PPV, positive predictive value; NPV, negative predictive value.