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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