Table 4.
Prognostic validity of different cutoff values of each severity indicator in CAP
| Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | |
|---|---|---|---|---|
| B/A ratio | ||||
| ≥6 mg/g | 92.9 | 54.6 | 8.9 | 99.4 |
| ≥8 mg/g | 85.7 | 76.1 | 14.6 | 99.1 |
| ≥10 mg/g | 64.3 | 88.7 | 21.4 | 98.1 |
| ≥12 mg/g | 50.0 | 92.8 | 25.0 | 97.5 |
| PSI | ||||
| ≥3 | 100 | 5.8 | 4.8 | 100 |
| ≥4 | 85.7 | 47.4 | 7.2 | 98.6 |
| ≥5 | 64.3 | 92.2 | 28.1 | 98.2 |
| CURB-65 | ||||
| ≥2 | 100 | 30.0 | 6.4 | 100 |
| ≥3 | 71.4 | 66.9 | 9.3 | 98.0 |
| ≥4 | 28.6 | 93.5 | 17.4 | 96.5 |
| A-DROP | ||||
| ≥2 | 92.9 | 35.5 | 6.4 | 99.0 |
| ≥3 | 64.3 | 68.3 | 8.8 | 97.6 |
| ≥4 | 28.6 | 93.5 | 17.4 | 96.5 |
Abbreviations: A-DROP, age, dehydration, respiratory failure, orientation disturbance, and pressure scale; B/A ratio, blood urea nitrogen to serum albumin ratio; CAP, community-acquired pneumonia; CURB-65, confusion, urea, respiratory rate, blood pressure, and age ≥65 scale; NPV, negative predictive value; PPV, positive predictive value; PSI, pneumonia severity index.