Research Article
Retrospective Multivariate Analysis of Data from Children with Suspected Appendicitis: A New Tool for Diagnosis
Table 5
Relation between duration of symptoms and accuracy of the New Scoring System (NSS).
| Duration of symptoms | True negative | False positive | False negative | True positive |
| =<12 hours (n=402) | 63.2% | 10.2 | 2.5% | 24.1% | 12-24 hours (n=214) | 49.1% | 10.7 | 0.5% | 39.7% | 24-48 hours (n=184) | 52.2% | 2.7% | 2.7% | 42.4% | >48 hours (n=158) | 50.6% | 3.2% | 1.9% | 44.3% | Total | 55.8% | 7.7% | 2.1% | 34.4% |
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