Buruli ulcer disease prevalence in Benin, West Africa: associations with land use/cover and the identification of disease clusters

Table 1 Summary statistics for the number of Buruli ulcer cases and potential covariates used in analyses.

Variable	Mean	Minimum	Maximum
Dependent variable
Buruli ulcer cases	1.8	0.0	29
Covariates
Agriculture (0.1)	0.33	0.0	1.0
Agriculture (0.5)	0.33	0.0	1.0
Agriculture (1)	0.33	0.0	1.0
Agriculture (5)	0.33	0.0	0.88
Agriculture (10)	0.33	0.0	0.77
Agriculture (20)	0.31	0.0	0.61
Agriculture (50)	0.25	0.0	0.42
Urban (0.1)	0.05	0.0	1.0
Urban (0.5)	0.03	0.0	0.62
Urban (1)	0.02	0.0	0.48
Urban (5)	0.01	0.0	0.21
Urban (10)	0.01	0.0	0.13
Urban (20)	0.01	0.0	0.06
Urban (50)	0.01	0.0	0.06
Water (0.1)	0.0	0.0	1.0
Water (0.5)	0.01	0.0	0.88
Water (1)	0.01	0.0	0.72
Water (5)	0.01	0.0	0.42
Water (10)	0.01	0.0	0.34
Water (20)	0.01	0.0	0.23
Water (50)	0.01	0.0	0.07
Wetland (0.1)	0.0	0.0	0.17
Wetland (0.5)	0.01	0.0	0.19
Wetland (1)	0.01	0.0	0.20
Wetland (5)	0.0	0.0	0.18
Wetland (10)	0.02	0.0	0.23
Wetland (20)	0.02	0.0	0.17
Wetland (50)	0.03	0.0	0.11
Forest (0.1)	0.02	0.0	1.0
Forest (0.5)	0.03	0.0	0.71
Forest (1)	0.03	0.0	0.50
Forest (5)	0.04	0.0	0.57
Forest (10)	0.05	0.0	0.70
Forest (20)	0.06	0.0	0.76
Forest (50)	0.07	0.0	0.52
Distance to river (m)	22.4	3,850	12,157
Wetness index	6.8	7.9	9.2
Mean elevation (m)	120.9	51.8	345.4

Land use/cover was estimated for different buffer widths around individual villages, while mean wetness index and elevation are based on the village drainage basin (see Methods). Land use/cover variable is followed by buffer radius (km) in parentheses.

ISSN: 1476-072X