Table 2 Analysis of the infectious status of Chinese worker in Africa at different ecological environment
Variable | Number | Infection rate (%) | \(\chi^{ 2}\) | P |
|---|---|---|---|---|
Types of environment | 25.889 | 0.000 | ||
Island | 68 | 3 (4.41) | ||
Plain | 219 | 15 (6.85) | ||
City | 846 | 60 (7.10) | ||
Mountain | 313 | 49 (15.65) | ||
Others | 46 | 7 (15.22) | ||