Table 5 Test characteristics of the automated interpretation algorithm by sample
From: Automated identification of pneumonia in chest radiograph reports in critically ill patients
Test characteristics by interpretation samples (%) | ||||
|---|---|---|---|---|
Dataset | Sensitivity | Specificity | PPV | NPV |
Negative-only (versus Positive or Possible) | ||||
Validation | 92.7 | 91.1 | 93.3 | 90.3 |
Derivation | 93.2 | 96.8 | 96.8 | 93.1 |
Overall | 92.8 | 93.1 | 93.5 | 92.3 |
Positive-only (versus Possible or Negative) | ||||
Validation | 45.3 | 99.0 | 77.4 | 95.9 |
Derivation | 53.3 | 99.0 | 72.7 | 97.7 |
Overall | 45.0 | 99.0 | 75.8 | 96.3 |
Possible-only (versus Positive or Negative) | ||||
Validation | 86.6 | 87.4 | 79.1 | 92.3 |
Derivation | 94.2 | 89.9 | 87.9 | 95.2 |
Overall | 89.9 | 87.5 | 83.8 | 92.4 |