Table 2.

Coefficients of the Bayesian negative binomial geostatistical model based on overdispersed individual Schistosoma mansoni egg count data, obtained from 31,458 school-age children and young adults in East Africa during 2003-2004.

Parameter	Spatial Model				Non-spatial Model
		95% Bayesian CI				95% Bayesian CI
	Posterior Mean	Lower 2.5%	Upper 97.5%	Posterior Median	Posterior Mean	Lower 2.5%	Upper 97.5%	Posterior Median
Intercept	9.941	5.768	13.223	10.055	10.295	9.826	10.770	10.292
Sex (Female)*	−0.413	−0.721	−0.106	−0.414	−0.463	−0.590	−0.336	−0.463
Elevation	−0.007	−0.010	−0.004	−0.007	−0.005	−0.005	−0.004	−0.005
Overdispersion parameter	0.060	0.058	0.062	0.060	0.031	0.030	0.032	0.031
Distance to nearest perennial water body†	−5.358	−7.512	−3.295	−5.364	−4.187	−4.334	−4.041	−4.188
Variance of the spatial random-effect	24.362	19.062	32.070	23.955
Range of spatial correlation†	0.137	0.091	0.198	0.134

^*Reference category: Sex (Male).

^†Unit: decimal degrees. 1 decimal degree = approximately 122 km at the equator.