The geographic distribution of onchocerciasis in the 20 participating countries of the African Programme for Onchocerciasis Control: (2) pre-control endemicity levels and estimated number infected

Table 3 Comparison of priority areas for treatment identified by the two analytical approaches: expert analysis and geostatistical analysis

	High risk (expert analysis)
Probability that nodule prevalence exceeds 20% (geostatistical analysis)	Yes			No			Total
	Surface 1000 km²	Population		Surface 1000 km²	Population		Surface 1000 km²	Population
	Surface 1000 km²	(1000)	% of total	Surface 1000 km²	(1000)	% of total	Surface 1000 km²	(1000)	% of total
> 0.9	1,440	35,447	98.0%	25	714	2.0%	1,465	36,161	100.0%
> 0.5	2,193	55,066	93.4%	152	3,877	6.6%	2,345	58,943	100.0%
> 0.1	2, 794	72, 479	80.4%	837	17, 682	19.6%	3,631	90,162	100.0%
Total surveyed area	3,180	83,972	35.4%	5,089	152,986	64.6%	8,270	236,959	100.0%

ISSN: 1756-3305