Table 12 Accuracy of CXR, LUS, and CCT as regards diagnosis of CAP
| Â | CXR | Total | ||
|---|---|---|---|---|
Positive | Negative | |||
Criterion diagnosis | Positive | 21 | 21 | 42 |
Negative | 0 | 0 | 0 | |
Total | 21 | 21 | 42 | |
Index | Estimate | SE | Lower 95% CI | Upper 95% CI |
Sensitivity | 50% | 8% | 34% | 66% |
Specificity | – | – | – | – |
Efficiency (correct classification rate) | 50% | 8% | 34% | 66% |
The predictive value of the positive test | 100% | 0% | 84% | – |
Predictive value of the negative test | 0% | 0% | – | 16% |
False positive rate | – | – | – | – |
False negative rate | 50% | 8% | 34% | 66% |
Misclassification rate | 50% | 8% | 34% | 78% |
Prevalence | 100% | 0% | 92% | – |
| Â | LUS | Total | ||
Positive | Negative | |||
Criterion diagnosis | Positive | 37 | 5 | 42 |
Negative | 0 | 0 | 0 | |
Total | 37 | 5 | 42 | |
Index | Estimate | SE | Lower 95% CI | Upper 95% CI |
Sensitivity | 88% | 5% | 74% | 96% |
Specificity | – | – | – | – |
Efficiency (Correct classification rate) | 88% | 5% | 74% | 96% |
The predictive value of the positive test | 100% | 0% | 91% | – |
Predictive value of the negative test | 0% | 0% | – | 52% |
False positive rate | – | – | – | – |
False negative rate | 12% | 5% | 4% | 26% |
Misclassification rate | 12% | 5% | 4% | 36% |
Prevalence | 100% | 0% | 92% | – |
| Â | CCT | Total | ||
Positive | Negative | |||
Criterion diagnosis | Positive | 40 | 2 | 42 |
Negative | 0 | 0 | 0 | |
Total | 40 | 2 | 42 | |
Index | Estimate | SE | Lower 95% CI | Upper 95% CI |
Sensitivity | 95% | 3% | 84% | 99% |
Specificity | – | – | – | – |
Efficiency (correct classification rate) | 95% | 3% | 84% | 99% |
The predictive value of the positive test | 100% | 0% | 91% | – |
The predictive value of the negative test | 0% | 0% | – | 84% |
False positive rate | – | – | – | – |
False negative rate | 5% | 3% | 1% | 16% |
Misclassification rate | 5% | 3% | 1% | 22% |
Prevalence | 100% | 0% | 92% | – |