Table 2.
Results of univariate analysis: the relationship between response and explanatory variables. Each explanatory variable was categorized (equally divided from grade I to a maximum of V by descending value). Variables with p-values less than 0.15 (in bold) were advanced to the next step.
| Variables | Grade (Threshold) | Total Samples (n = 2578) | Coefficients | Standard Errors | p-Value |
|---|---|---|---|---|---|
| Elevation | Grade I (232) | 648 | - | - | - |
| Grade II (352) | 649 | −0.185 | 0.079 | 0.099 | |
| Grade III (490) | 640 | 0.261 | 0.112 | 0.020 | |
| Grade IV (1157) | 641 | 0.082 | 0.112 | 0.459 | |
| Distance from road (roadway and sidewalk) | Grade I (276.2) | 645 | - | - | - |
| Grade II (602) | 644 | −0.009 | 0.111 | 0.933 | |
| Grade III (1171.5) | 644 | −0.072 | 0.112 | 0.521 | |
| Grade IV (6887.1) | 645 | −0.295 | 0.112 | 0.009 | |
| Wild boar distribution index | Grade I (0.415) | 516 | - | - | - |
| Grade II (0.504) | 517 | 0.216 | 0.125 | 0.086 | |
| Grade III (0.628) | 514 | −0.070 | 0.125 | 0.576 | |
| Grade IV (0.761) | 517 | −0.675 | 0.127 | >0.001 | |
| Grade V (1) | 514 | 0.794 | 0.128 | >0.001 | |
| Travel time to major cities | Grade I (57) | 647 | - | - | - |
| Grade II (107.5) | 642 | −0.048 | 0.112 | 0.670 | |
| Grade III (213) | 645 | −0.252 | 0.112 | 0.025 | |
| Grade IV (860) | 644 | 0.146 | 0.111 | 0.191 | |
| Soil moisture | Grade I (137.6) | 775 | - | - | - |
| Grade II (139.6) | 975 | −0.670 | 0.098 | >0.001 | |
| Grade III (141.3) | 258 | −0.280 | 0.144 | 0.053 | |
| Grade IV (143.2) | 570 | −0.965 | 0.114 | >0.001 | |
| Temperature seasonality (bioclim 4) | Grade I (9726.3) | 645 | - | - | - |
| Grade II (10,073) | 646 | −0.264 | 0.112 | 0.018 | |
| Grade III (10,226.8) | 642 | −0.221 | 0.112 | 0.048 | |
| Grade IV (10,435) | 645 | −0.311 | 0.112 | 0.005 | |
| Temperature annual range (bioclim 7) | Grade I (381) | 656 | - | - | - |
| Grade II (390) | 670 | −0.14 | 0.110 | 0.189 | |
| Grade III (396) | 650 | −0.27 | 0.111 | 0.015 | |
| Grade IV (411) | 602 | −0.36 | 0.114 | 0.002 | |
| Precipitation seasonality (bioclim 15) | Grade I (81) | 660 | - | - | - |
| Grade II (91) | 641 | 0.099 | 0.111 | 0.374 | |
| Grade III (98) | 656 | −0.062 | 0.111 | 0.573 | |
| Grade IV (105) | 621 | 0.039 | 0.112 | 0.728 | |
| Precipitation of warmest quarter (bioclim 18) | Grade I (731) | 658 | - | - | - |
| Grade II (792) | 634 | 0.190 | 0.112 | 0.089 | |
| Grade III (849) | 651 | 0.161 | 0.111 | 0.145 | |
| Grade IV (911) | 635 | −0.209 | 0.112 | 0.064 | |
| Precipitation of coldest quarter (bioclim 19) | Grade I (72) | 693 | - | - | - |
| Grade II (78) | 610 | −0.247 | 0.112 | 0.027 | |
| Grade III (94) | 640 | −0.060 | 0.110 | 0.583 | |
| Grade IV (163) | 635 | 0.093 | 0.110 | 0.397 |