Table 1

Blindness prevalence estimates by three different methods in 34 communities mesoendemic for onchocerciasis, Kaduna State, northern Nigeria

Perceived visual statusExamination of visually disabledWhole community examination
Number blind221296213
Denominator813981396831
Overall prevalence estimate (95% CI)2.7 (2.4 to 3.1)3.6 (3.2 to 4.1)3.1 (2.7 to 3.6)