Table 1 Factors affecting spatial heterogeneity in HFRS incidence in Changchun
Period | Variable (unit) | Univariate analysis | Multivariate analysis | ||
|---|---|---|---|---|---|
| Â | PC (95% CI) | P-value | PC (95% CI) | P-value | |
1988-1997 | Livestock husbandry | Â | Â | Â | Â |
|  |   Large animals (10 h/km2) | 60.5 (-68.9, 729.4) | 0.572 | - | - |
|  |   Sheep density (10 h/km2) | -41.3 (-81.6, 87.4) | 0.368 | - | - |
|  |   Deer density (10 h/km2) | 154.6 (-2.6, 565.4) | 0.057 | NS. | NS. |
| Â | Climate factors | Â | Â | Â | Â |
|  |   Temperature (1°C) | -74.6 (-95.6, 48.0) | 0.128 | - | - |
|  |   Precipitation (1 mm) | 26.7 (2.3, 56.9) | 0.030 | NS. | NS. |
|  |   Relative humidity (%) | 243.1 (136.3, 398.1) | < 0.001 | 243.1 (136.3, 398.1) | < 0.001 |
| Â | Land cover | Â | Â | Â | Â |
|  |   Irrigated cropland (1%) | 16.7 (-2.0, 38.9) | 0.084 | NS. | NS. |
|  |   Rainfed cropland (1%) | -2.8 (-11.8, 7.0) | 0.564 | - | - |
|  |   Forest (1%) | 4.5 (-4.4, 14.3) | 0.332 | - | - |
|  |   Grassland (1%) | -28.8 (-63.9, 40.4) | 0.327 | - | - |
|  |   Built-up lands (1%) | -25.2 (-54.0, 21.6) | 0.242 | - | - |
1998-2012 | Livestock husbandry | Â | Â | Â | Â |
|  |   Large animals (10 h/km2) | 2.1 (-21.2, 32.3) | 0.874 | - | - |
|  |   Sheep density (10 h/km2) | -12.1 (-43.8, 37.4) | 0.571 | - | - |
|  |   Deer density (10 h/km2) | 41.4 (30.2, 53.5) | < 0.001 | 41.4 (30.2, 53.5) | < 0.001 |
| Â | Climate factors | Â | Â | Â | Â |
|  |   Temperature (1°C) | 7.7 (-87.6, 836.5) | 0.947 | - | - |
|  |   Precipitation (1 mm) | 28.6 (7.8, 53.4) | 0.005 | NS. | NS. |
|  |   Relative humidity (%) | 46.3 (-19.5, 165.7) | 0.211 | - | - |
| Â | Land cover | Â | Â | Â | Â |
|  |   Irrigated cropland (1%) | 6.4 (-7.7, 22.6) | 0.392 | - | - |
|  |   Rainfed cropland (1%) | -2.4 (-10.6, 6.5) | 0.580 | - | - |
|  |   Forest (1%) | 4.4 (-4.4, 14.0) | 0.342 | - | - |
|  |   Grassland (1%) | -17.1 (-52.6, 45.0) | 0.511 | - | - |
|  |   Built-up lands (1%) | -3.5 (-15.2, 9.8) | 0.591 | - | - |