The cost-efficient survey design to declare elimination of soil-transmitted helminths as a public health problem.

This table represents the required sample size (nschools×nchildren), the decision cut-off c and the total survey costs (Ctot) for four different survey designs (KKa×b) that vary in the number of stool samples per child (= a) and the number of Kato-Katz thick smears per sample (= b).