Table 2.
Epidemiology characteristics of China, Clade A2a, UK, Switzerland, USA.
| Countries/Clade |
|||||
|---|---|---|---|---|---|
| Characteristics | China | A2a | UK | Switzerland | USA |
| Age | |||||
| 1-20 | 8 | 2 | 0 | 0 | 0 |
| 21-60 | 63 | 36 | 27 | 13 | 15 |
| >60 | 27 | 2 | 2 | 1 | 2 |
| Mean age | 46.66 | 40.24 | 46.17 | 33.29 | 49.06 |
| P value | 0.0071 | 0.0102 | 0.0974 | 0.1324 | |
| Sex | |||||
| Female | 40 | 12 | 13 | 3 | 11 |
| Male | 69 | 30 | 16 | 11 | 8 |
| P value | 0.3463 | 0.4239 | 0.2594 | 0.0816 | |
The epidemiology characteristics of A2a clade, UK, Switzerland, and USA were compared with those of China. P-value was calculated by the Mann–Whitney U test or Kruskal–Wallis test. Bold P values indicate P < 0.05. na: not applicable, meant the missing data.