Table 2. Patient characteristics in the external validation cohort enrolled from another hospital.
| Characteristics | COVID-19 (n = 11) | Influenza (n = 20) | CAP (n = 24) | P value |
| Age (years) | 31.0 (25.0 - 50.0) | 32.0 (26.5 - 52.3) | 39.0 (27 - 48) | 0.95 |
| Male, n (%) | 6 (54.5%) | 12 (60.0%) | 15 (62.5%) | 0.66 |
| Fever, n (%) | 9 (81.8%) | 13 (65.0%) | 20 (83.3%) | 0.65 |
| Cough, n (%) | 3 (27.3%) | 9 (45.0%) | 11 (45.8%) | 0.36 |
| Sore throat, n (%) | 1 (9.1%) | 3 (15.0%) | 2 (8.3%) | 0.81 |
| Fatigue, n (%) | 1 (9.1%) | 6 (30.0%) | 4 (16.7%) | 0.86 |
| WBC (109/L) | 6.5 (5.1 – 8.8) | 7.7 (5.5 - 9.8) | 6.8 (5.3 - 8.2) | 0.32 |
| Lymphocyte count (109/L) | 1.2 (1.0 - 1.9) | 1.3 (0.9 - 2.1) | 1.7 (1.3 - 2.3) | 0.03 |
| Lymphocyte percentage (%) | 13.1 (8.5 – 14.8) | 17.2 (11.7 - 25.5) | 22.1 (17.0 - 30.2) | 0.093 |
The data are presented as the median and interquartile range (IQR), or n (%). For categorical data, chi-square test was used, and for continuous variables, Kruskal-Wallis was applied. WBC: white blood cell count.