Table 6 Factors and classification function coefficients of low and high infection group
Groups | Terrain (plain = 1; hills = 2; mountainous area = 3) | Altitude (m) | Annual average temperature (°C) | Annual average rainfall (mm) | Proportion of sanitary toilets (%) | Per capita GNP (¥, RMB) | Annual net income per capita (¥, RMB) | Constant |
|---|---|---|---|---|---|---|---|---|
Low infection group | 6.286 | − 0.019 | 0.580 | 0.120 | 1.359 | 0.023 | 0.029 | − 42.788 |
High infection group | 7.268 | − 0.021 | 0.589 | 0.134 | 1.213 | 0.030 | 0.025 | − 46.648 |