Table 5. Performances Based on rRT-PCR Results Varied by Presence and Duration of Symptoms.
| Classifiers | Sensitivity | Specificity | PPV | NPV |
|---|---|---|---|---|
| Symptomatic patients (n = 247) | ||||
| Formal radiology report (%) | 66.7 (8/12; 34.9–90.1) | 64.3 (151/235; 57.8–70.4) | 8.7 (8/92; 3.8–16.4) | 97.4 (151/155; 93.5–99.3) |
| CAD (%) | 50.0 (6/12; 21.1–78.9) | 57.9 (136/235; 51.3–64.3) | 5.7 (6/105; 2.1–12.0) | 95.8 (136/142; 91.0–98.4) |
| Asymptomatic patients (n = 85) | ||||
| Formal radiology report (%) | 75.0 (3/4; 19.4–99.4) | 74.1 (60/81; 63.1–83.2) | 12.5 (3/24; 2.7–32.4) | 98.4 (60/61; 91.2–100) |
| p values* | > 0.999 | 0.106 | 0.695 | > 0.999 |
| CAD (%) | 25.0 (1/4; 0.6–80.6) | 64.2 (52/81; 52.8–74.6) | 3.3 (1/30; 0–17.2) | 94.5 (52/55; 84.9–98.9) |
| p values* | 0.585 | 0.317 | > 0.999 | 0.712 |
| Patients with duration of symptom ≤ 3 days (n = 184) | ||||
| Formal radiology report (%) | 50.0 (2/4; 6.7–93.2) | 67.0 (120/179; 59.6–73.9) | 3.3 (2/61; 0.4–11.3) | 98.4 (120/122; 94.2–99.8) |
| CAD (%) | 25.0 (1/4; 0.6–80.6) | 59.8 (107/179; 52.2–67.0) | 1.4 (1/73; 0–7.4) | 97.3 (107/110; 92.2–99.4) |
| Patients with duration of symptom > 3 days (n = 57) | ||||
| Formal radiology report (%) | 75.0 (6/8; 34.9–96.8) | 49.0 (24/49; 34.4–63.7) | 19.4 (6/31; 7.5–37.5) | 89.3 (24/26; 74.9–99.1) |
| p values† | 0.548 | 0.02 | 0.016 | 0.142 |
| CAD (%) | 62.5 (5/8; 24.5–91.5) | 51.0 (25/49; 36.3–65.6) | 17.2 (5/29; 5.8–35.8) | 92.3 (25/28; 71.8–97.7) |
| p values† | 0.546 | 0.271 | 0.007 | 0.098 |
Numbers in parentheses indicate numerators/denominators; 95% confidence intervals. *Comparison with performances in symptomatic patients, †Comparison with performances in patients with duration of symptom ≤ 3 days.