Validation at 1 year of a prediction model for diagnosing paediatric group A β-haemolytic streptococcal pharyngitis*
| Assessment tool | Sensitivity (95% CI) | Specificity (CI) | +LR | −LR | PP (CI) |
|---|---|---|---|---|---|
| *Abbreviations and diagnostic terms defined in glossary. | |||||
| †Higher scores of the prediction model equal more severe indications of the clinical variables. | |||||
| Prediction model† | |||||
| Score = 0 | 99% (96 to 100) | 5% (3 to 7) | 1.0 | 0.2 | 0.12 (0.02 to 0.3) |
| Score 1 to 3 | 81% (75 to 86) | 7% (5 to 10) | 0.9 | 2.5 | 0.36 (0.3 to 0.4) |
| Score ≥ 4 | 17% (13 to 27) | 98% (94 to 99) | 5.9 | 0.8 | 0.79 (0.6 to 0.9) |
| Subjective score | |||||
| 6 to 10 | 75% (68 to 80) | 56% (51 to 62) | 1.7 | 0.5 | 0.52 (0.5 to 0.6) |
| Rapid antigen test | 86% (81 to 91) | 91% (87 to 94) | 9.6 | 0.1 | 0.85 (0.8 to 0.9) |