Table 3.
Performance of the individual criteria for the prediction of mortality among patients with CAP (n = 3974).
| Variable | Respiratory rate ≥22/min | Altered mentation | SBP ≤100 mm Hg | |
|---|---|---|---|---|
| Patients alive (%) | Yes | 1144 (81.1) | 262 (64.2) | 560 (80.9) |
| No | 267 (18.9) | 146 (35.8) | 132 (19.1) | |
| χ2 | 255.317 | 249.391 | 107.394 | |
| p Value | <0.0001 | <0.0001 | <0.0001 | |
| RR (95% CI) p Value |
63.508 (24.394–169.261) <0.0001 |
8.753 (6.462–11.957) <0.0001 |
4.758 (3.426–6.492) <0.0001 |
|
| OR (95% CI) p Value |
75.915 (28.627–207.293) <0.0001 |
12.632 (8.417–17.839) <0.0001 |
5.671 (3.916–7.915) <0.0001 |
|
| Sensitivity, % (95% CI) | 97.4 (92.8–99.5) |
53.3 (46.8–63.5) |
48.2 (39.4–56.9) |
|
| Specificity, % (95% CI) | 69.1 (67.1–71.3) |
92.9 (91.4–94.2) |
84.9 (83.2–86.4) |
|
| PPV, % (95% CI) | 18.9 (17.2–19.5) |
35.8 (30.7–39.8) |
19.1 (16.0–21.8) |
|
| NPV, % (95% CI) | 99.7 (99.3–99.9) |
96.4 (95.7–97.0) |
95.7 (95.1–96.3) |
|
| Youden’s index | 0.67 | 0.46 | 0.33 | |
| AUROC (95% CI) | 0.837 (0.820–0.849) |
0.734 (0.702–0.765) |
0.671 (0.653–0.692) |
|
CAP: community-acquired pneumonia; SBP: systolic blood pressure; RR: relative risk; CI: confidence interval; OR: odds ratio; PPV: positive predictive value; NPV: negative predictive value; AUROC: the area under the receiver operating characteristic curve.