Table 4 Diagnostic performance of lung ultrasonography and chest radiograph combined with procalcitonin for the diagnosis of pneumonia
Sens % (95% CI) | Spec % (95% CI) | PPV % (95% CI) | NPV % (95% CI) | +LR (95% CI) | −LR (95% CI) | |
|---|---|---|---|---|---|---|
Positive LUS or PCT ≥0.25 | 96.7 (88.6–99.5) | 53.7 (41.1–66) | 65.6 (54.8–75.3) | 94.7 (82.2–99.2) | 2.09 (1.61–2.72) | 0.06 (0.02–0.24) |
Positive LUS and PCT >0.5 | 32.8 (21.3–46) | 94 (85.4–98.3) | 83.3 (62.6–95.1) | 60.6 (50.5–70) | 5.49 (1.99–15.17) | 0.71 (0.59–0.86) |
Positive CXR or PCT ≥0.25 | 80.3 (68.1–89.4) | 50.7 (38.2–63.2) | 59.8 (48.3–70.4) | 73.9 (58.9–85.7) | 1.63 (1.2–2.1) | 0.39 (0.22–0.68) |
Positive CXR and PCT >0.5 | 24.6 (14.5–37.3) | 98.5 (91.9–99.7) | 93.7 (69.7–98.9) | 58.9 (49.2–68.1) | 16.48 (2.24–121.05) | 0.77 (0.66–0.89) |