Table 1 Epidemiological and baseline characteristics of over all 348 participants
General data | COVID-19 cohort (n = 64) | Viral pneumonia cohort (n = 284) | P |
|---|---|---|---|
Age | |||
 Median (range) | 6.3 yr (3 mon to 18 yr) | 3.2 yr (1 mon to 13 yr) | < 0.001 |
  < 1 yr [n (%)] | 6 (9.4) | 44 (15.5) | < 0.001 |
 1–5 yr [n (%)] | 23 (35.9) | 220 (77.5) | |
 6–10 yr [n (%)] | 20 (31.2) | 19 (6.7) | |
 11–18 yr [n (%)] | 15 (18.8) | 1 (0.4) | |
Male [n(%)] | 31 (48.4) | 161 (56.7) | 0.230 |
 Underlying chronic disease [n (%)] | 2 (3.1) | 19 (6.7) | 0.279 |
 Chronic lung disease (repeated wheezing) | 1 (1.6) | 14 (4.9) | 0.231 |
 Heart disease | 0 (0.0) | 1 (0.4) | 1.000 |
 Others | 1 (1.6) | 5 (1.8) | 1.000 |
Exposure history [n (%)]a | |||
 Contacted with confirmed family members | 53 (82.8) | 23 (8.1) | < 0.001 |
 Contacted with other confirmed cases | 3 (4.7) | 15 (5.3) | |
 Travel or residence in epidemic areaa | 7 (10.9) | 0 (0.0) | |
 No clear exposure history | 1 (1.6) | 246 (86.6) | |