Table 2.
Independent predictors in diagnosing SARS (multivariate analysis).
| Predictor | Multivariate OR (95% CI) | Z Score |
|---|---|---|
| History of exposure or traveling∗ | 1.5 (1.3–1.6) | 3.4 |
| Clinical symptoms | ||
| Dyspnea | 1.1 (1.0–1.3) | 2.1 |
| Myalgia | 1.2 (1.0–1.3) | 2.2 |
| Chest radiographs | ||
| Multilobar or bilateral infiltrates∗ | 4.9 (4.4–5.4) | 11.4 |
| Laboratory findings | ||
| Lymphocytopenia∗ | 2.1 (1.8–2.5) | 6.1 |
| Thrombocytopenia | 1.2 (1.1–1.4) | 2.2 |
| C-reactive protein >5.0 mg/dL∗ | 1.4 (1.3–1.5) | 3.3 |
| Monocyte predominance on sputum Gram's stain∗ | 5.8 (5.3–6.4) | 14.6 |
| aPTT ≥40 s∗ | 1.4 (1.2–1.5) | 3.1 |
| Lactate dehydrogenase ≥450 IU/L∗ | 1.5 (1.3–1.6) | 3.2 |
∗
These 7 variables account for 98% of all clinical information.