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Table 1 Description and summary (mean ± standard deviation, SD) of predictors used in the analyses for West and East Africa, with abbreviation and unit

From: Regional level risk factors associated with the occurrence of African swine fever in West and East Africa

Description of data Abbreviation Units Mean ± SD
West Africa East Africa
Biotic variables
 Pig density Pig n/km2 561 ± 732 885 ± 1679
 Common warthog WarthogC 0.47 ± 0.46 0.86 ± 0.15
 Bushpig BushpigC naa 0.91 ± 0.12
 Red river hog RiverhogC 0.45 ± 0.47 naa
 Giant forest hog ForesthogC 0.06 ± 0.21 0.31 ± 0.41
 Human population density Human n/km2 178 ± 286 273 ± 310
 Road density Road km/km2 15.7 ± 14.5 64.6 ± 65.8
 Mean tick risk TickRiskMean naa 0.26 ± 0.12
 Area with high-tick-risk TickRisk2 naa 0.44 ± 0.35
 Area with high-tick-risk TickRisk4 naa 0.17 ± 0.20
 Area with high-tick-risk TickRisk6 naa 0.03 ± 0.10
Habitat related variables
 Percentage of habitat area Habitat 0.87 ± 0.21 0.73 ± 0.20
 Measure of the degree of isolation and fragmentation MPI 886 ± 2563 4214 ± 7233
 Mean nearest neighbour MNN m 750 ± 1041 1611 ± 1036
 Percentage of protected area PDA 0.18 ± 0.23 0.17 ± 0.16
Climatic variables
 Annual mean temperature TemMean °C 28.2 ± 1.08 20.9 ± 2.17
 Mean temperature in preceding year PreTemMean °C 27.9 ± 1.09 21.1 ± 2.13
 Annual mean precipitation RainMean mm 101 ± 31.1 101 ± 24.3
 Mean precipitation in preceding year PreRainMean mm 97.4 ± 32.0 94.0 ± 22.0
  1. a There is no bush pig in West Africa and no red river hog in East Africa, tick risk variables were not included in the analyses of West Africa