Group | A | B | C | D |
---|---|---|---|---|
Total number | 50 | 7 | 8410 | 4 |
Age (median) | 0–89(16) | 1–74(40) | 0–104(41) | 1–82(13) |
Gender (male: %) | 24(48) | 4(57.2) | 3900(46.4) | 3(75) |
Outcome (%) | ||||
  Mild | 37 (71.2) | 5 (62.5) | 5,905 (68.1) | 4 (100) |
  Moderate | 12 (23.1) | 1 (12.5) | 2,393 (27.6) | 0 (0) |
  Severe | 1 (1.9) | 1 (12.5) | 89 (1.0) | 0 (0) |
  Lethal | 0 (0) | 0 (0) | 22 (0.3) | 0 (0) |
  Dead | 0 (0) | 0 (0) | 1 (0) | 0 (0) |
  The cases of severity: proportion (%)a | 13 (26) | 2 (29) | 2505 (30) | 0 (0) |
  Expected value | 16 | 2 | 2668 | 1 |
  Standardized residual | 0.7 | 0.1 | 3.1 | 1.1 |
  P value of residual analysis | 0.384 | 0.585 |  < 0.001 | 0.173 |