Research Article
The Diagnostic Value of Serum C-Reactive Protein for Identifying Pneumonia in Hospitalized Patients with Acute Respiratory Symptoms
Table 2
Operating characteristics of C-reactive protein for identifying pneumonia according to different serum values.
| | Serum CRP (mg/L) | Sensitivity, % (95% CI) | Specificity, % (95% CI) | LR+ | LR− |
| | ≥50 | 91.3 (88.7–93.4) | 43.9 (38.9–49.1) | 1.6 (1.4–1.7) | 0.2 (0.1–0.2) | | ≥100 | 82.4 (79.0–85.3) | 72.3 (67.6–76.7) | 3 (2.5–3.5) | 0.2 (0.2-0.2) | | ≥150 | 65.1 (61.1–69.0) | 87.16 (83.2–90.2) | 5.0 (3.8–6.6) | 0.4 (0.3–0.4) | | ≥200 | 44.8 (40.8–49.0) | 95.6 (93.0–97.2) | 10.2 (6.3–16.6) | 0.5 (0.5–0.6) |
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CRP, C-reactive protein; LR, likelihood ratio.
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