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Diagnostic accuracy parameters of CXR (classic/probable COVID) vs PCR
| Statistic | Value | 95% CI |
|---|---|---|
| Sensitivity | 61% | 52–69% |
| Specificity | 76% | 70–82% |
| Positive Likelihood Ratio | 2.6 | 1.9–3.4 |
| Negative Likelihood Ratio | 0.52 | 0.41–0.64 |
| Disease prevalence | 40% | 35–45% |
| Positive Predictive Value | 63% | 54–71% |
| Negative Predictive Value | 75% | 68–80% |
