Diagnostic characteristics of chest radiographic findings and B type natriuretic peptide (BNP) levels for detecting heart failure*
| Tests | Sensitivity (95% CI) | Specificity (CI) | +LR | −LR |
|---|---|---|---|---|
| *Diagnostic terms defined in glossary; LRs calculated from data in article; CIs provided by author. | ||||
| Cardiomegaly | 79% (75 to 83) | 80% (76 to 84) | 3.98 | 0.26 |
| Cephalisation | 41% (37 to 46) | 96% (93 to 97) | 9.41 | 0.61 |
| Interstitial oedema | 27% (23 to 31) | 98% (96 to 99) | 12.67 | 0.72 |
| BNP (pg/ml) | ||||
| ⩾100 | 90% (86 to 92) | 75% (71 to 79) | 3.66 | 0.14 |
| ⩾200 | 80% (76 to 84) | 87% (83 to 90) | 6.08 | 0.23 |
| ⩾300 | 71% (67 to 75) | 90% (87 to 93) | 7.18 | 0.32 |