Table 1.
Univariate statistics for the environmental variables considered in sites with and without HPS cases by Andes virus in southern Argentina.
| Variable | Description and units | HPS | Mean | SD | Median | K | B |
|---|---|---|---|---|---|---|---|
| ALT | Elevation above sea level (m) |
0 | 739.39 | 825.78 | 518.50 | 4,364.5 *** | 0.000018 ns |
| 1 | 749.03 | 358.73 | 726.00 | ||||
| BARE | Percentage of bare soil cover (%) |
0 | 34.26 | 33.94 | 26.00 | 8,506 *** | −0.0447 *** |
| 1 | 7.51 | 14.46 | 0.00 | ||||
| HERB | Percentage of grass cover (%) |
0 | 56.13 | 29.12 | 61.00 | 5,991.5 ns | −0.0024 ns |
| 1 | 54.28 | 23.18 | 59.00 | ||||
| TREE | Percentage of tree cover (%) |
0 | 9.61 | 15.65 | 3.00 | 1,909.5 *** | 0.05215 *** |
| 1 | 38.21 | 28.50 | 32.00 | ||||
| BIO1 | Annual mean temperature (x * 10, °C) |
0 | 131.02 | 53.56 | 135.50 | 8,256 *** | −0.0217 *** |
| 1 | 89.00 | 15.34 | 89.00 | ||||
| BIO2 | Mean diurnal range (Mean month (max-min), in °C) |
0 | 135.33 | 19.65 | 136.50 | 7,854 *** | −0.0308 *** |
| 1 | 125.31 | 12.61 | 123.00 | ||||
| BIO3 | Isothermality ((BIO2/BIO7) * 100) |
0 | 49.91 | 3.82 | 49.00 | 3,203.5 *** | 0.13419 ** |
| 1 | 51.66 | 1.87 | 52.00 | ||||
| BIO4 | Temperature seasonality (SD * 100) |
0 | 4,817.7 | 691.50 | 4,823.0 | 8,748 *** | −0.0015 *** |
| 1 | 4,284.7 | 317.77 | 4,248.0 | ||||
| BIO5 | Maximum temp of the warmest month (x * 10, °C) |
0 | 273.58 | 60.68 | 296.00 | 8,334.5 *** | −0.0153 *** |
| 1 | 228.61 | 23.10 | 224.00 | ||||
| BIO6 | Minimum temp of the coldest month (x * 10, °C) |
0 | 5.10 | 43.74 | 1.50 | 6,935.5 *** | −0.0124 ** |
| 1 | −11.46 | 10.41 | -11.00 | ||||
| BIO7 | Temperature annual range (BIO5-BIO6) (x * 10, °C) |
0 | 268.48 | 35.24 | 270.00 | 8,749 *** | −0.0302 *** |
| 1 | 240.07 | 18.52 | 237.00 | ||||
| BIO8 | Mean temp of the wettest quarter (x * 10, °C) |
0 | 141.24 | 95.40 | 152.00 | 8,886.5 *** | −0.0207 *** |
| 1 | 39.57 | 15.67 | 41.00 | ||||
| BIO9 | Mean temp of the driest quarter (x * 10, °C) |
0 | 112.47 | 39.82 | 109.50 | 2,965 *** | 0.0273 *** |
| 1 | 143.26 | 18.64 | 142.00 | ||||
| BIO10 | Mean temp of the warmest quarter (x * 10, °C) |
0 | 191.63 | 56.51 | 203.00 | 8,519.5 *** | −0.0201 *** |
| 1 | 144.44 | 18.17 | 143.00 | ||||
| BIO11 | Mean temp of the coldest quarter (x * 10, °C) |
0 | 68.54 | 51.69 | 69.00 | 7,706.5 *** | −0.0201 *** |
| 1 | 34.49 | 12.78 | 35.00 | ||||
| BIO12 | Annual precipitation (mm) |
0 | 494.92 | 338.62 | 402.50 | 1,705 *** | 0.00386 *** |
| 1 | 976.97 | 309.86 | 1,011.0 | ||||
| BIO13 | Precipitation of the wettest month (mm) |
0 | 75.13 | 48.68 | 63.50 | 1,182.5 *** | 0.0351 *** |
| 1 | 168.69 | 52.52 | 170.00 | ||||
| BIO14 | Precipitation of the driest month (mm) |
0 | 15.34 | 14.54 | 11.00 | 1,835.5 *** | 0.0623 *** |
| 1 | 28.67 | 11.41 | 26.00 | ||||
| BIO15 | Precipitation seasonality (variation coefficient) |
0 | 48.94 | 23.73 | 45.50 | 3,915 *** | 0.0200 ** |
| 1 | 58.02 | 7.70 | 58.00 | ||||
| BIO16 | Precipitation of the wettest quarter (mm) |
0 | 201.12 | 131.03 | 177.50 | 1,081 *** | 0.01396 *** |
| 1 | 455.36 | 131.42 | 476.00 | ||||
| BIO17 | Precipitation of the driest quarter (mm) |
0 | 54.09 | 49.44 | 40.00 | 1,728.5 *** | 0.02017 *** |
| 1 | 105.52 | 40.98 | 101.00 | ||||
| BIO18 | Precipitation of the warmest quarter (mm) |
0 | 151.59 | 128.00 | 88.00 | 5,584 ns | −0.00410 ** |
| 1 | 105.84 | 41.44 | 101.00 | ||||
| BIO19 | Precipitation of the coldest quarter (mm) |
0 | 94.67 | 98.46 | 56.00 | 438 *** | 0.0159 *** |
| 1 | 431.13 | 129.22 | 451.00 |
BARE: % of bare soil cover; HERB: % of grass cover; TREE: % of woody cover; HPS (0): HPS absence; HPS (1): HPS presence; SD: standard deviation; K: Kruskal-Wallis chi-squared statistic; B: univariate binomial Generalized Linear Model parameter (parameter significance according to a t-test on parameter SD with 245 degrees of freedom); *** p < 0.001; ** p < 0.01; * p < 0.05; p < 0.1; ns: not significant, p > 0.1.