Table 6.
Performance of the scores to predict acute appendicitis in all operated on patients
| Alvarado | AIR | RIPASA | AAS | |
|---|---|---|---|---|
| Cut-off | >5 | >5 | >7 | >13 |
| Sensitivity | 74.5% | 74.6% | 81.0% | 76.4% |
| Specificity | 46.1% | 44.3% | 43.7% | 49.4% |
| Accuracy | 72.5% | 72.4% | 78.4% | 74.4% |
| PPV | 94.8% | 94.4% | 95.0% | 95.0% |
| NPV | 12.0% | 12.2% | 14.7% | 14.3% |
| AUC (95% c.i.) | 0.645 (0.603,0.686) | 0.602 (0.555,0.650) | 0.669 (0.626,0.712) | 0.686 (0.645,0.727) |
| P | <0.001 | <0.001 | <0.001 | <0.001 |
Bold values indicate statistically significant results. PPV, positive predictive value; NPV, negative predictive value; AUC, area under receiver operating characteristic (ROC) curve; c.i., confidence intervals; AIR, Appendicitis Inflammatory Response; RIPASA, Raja Isteri Pengiran Anak Saleha Appendicitis; AAS, Adult Appendicitis Score.