Table 1.

Proportion of simulations from multiway uncertainty analysis, where the control strategy is the optimal cost-effective strategy

MDA	Snail control	Low-prevalence communities	High-prevalence communities
None	None	0	0
None	Annual	0	0
None	Semiannual	2.8	0
SBT annual	None	0	0
SBT semiannual	None	0	0
SBT annual	Annual	0.1	0
SBT annual	Semiannual	20.6	0
SBT semiannual	Annual	0	0
SBT semiannual	Semiannual	30.2	5.1
CWT, annual	None	0	0
CWT semiannual	None	0.1	0.3
CWT annual	Annual	3.5	0.4
CWT annual	Semiannual	42	23.5
CWT semiannual	Annual	0	0.3
CWT semiannual	Semiannual	0.7	70.5

The strategy that is the optimal cost-effective choice has the highest averted DALYs, with an ICER below the threshold of $1,377 US per DALY. CWT, community-wide treatment with MDA; SBT, school-based treatment with MDA.