Likelihood ratios for pneumonia diagnosis in adults.
| Clinical feature | LR+ | LR− |
|---|---|---|
| Cough | 1.8 | 0.3 |
| Dyspnoea | 1.4 | 0.7 |
| Sputum production | 1.3 | 0.6 |
| Fever | 2.1 | 0.7 |
| Chills | 1.6 | 0.9 |
| Night sweats | 1.7 | 0.8 |
| Respiratory rate >25 bpm | 3.4 | 0.8 |
| Heart rate >120 bpm | 1.9 | 0.9 |
| Temperature >37.8°C | 4.4 | 0.8 |
| Dullness to percussion | 4.3 | 0.8 |
| Decreased breath sounds | 2.5 | 0.6 |
| Crackles | 2.7 | 0.9 |
| Bronchial breath sounds | 3.5 | 0.9 |
LR− = negative likelihood ratio, likelihood ratio. LR+ = positive