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Table 1 Summary statistics of dependent and explanatory variables for a model explaining the spatio-temporal variation of tick-borne encephalitis in southern Germany from 2001-2008

From: Determinants of tick-borne encephalitis in counties of southern Germany, 2001-2008

Dependent variable Mean SD Min. Max.
Number of reported TBE infections in humans 1.95 3.26 0.00 39.00
County population size (in units of 10,000) 16.54 14.10 2.86 131.20
Explanatory variables     
Proportion of forest cover/county     
Broad-leafed forest 0.05 0.06 0 0.28
Coniferous forest 0.18 0.13 0 0.56
Mixed forest cover 0.09 0.07 0 0.36
Forest fragmentation     
Connectivity (largest forest patch/entire forest cover) 0.19 0.14 0 0.74
Hunting bag in previous year per km 2 hunting area     
Red deer Cervus elaphus 0.09 0.30 0 6.77
Roe deer Capreolus capreolus 4.46 1.30 0.76 10.10
Red fox Vulpes vulpes 2.17 0.91 0 17.86
Climatic variables     
Spring warming: Temperature increase from February-April (°C) corrected for mean January temperature 9.25 1.39 6.07 12.59
Unexplained spatial variation     
Total human TBE cases in all neighbouring counties per inhabitants of those counties 0.00013 0.00014 0 0.00091
Unexplained temporal variation     
Each year was entered as a fixed factor in the model -/- -/- -/- -/-
  1. Note that the hunting bag of roe deer in the counties of Bavaria is the average annual offtake of three years.