Table 2:

Calculation of effectiveness

Terminal node health state	Formula	Reasoning
Healthy, untreated		Assuming screening occurs at 18 months and health state is experienced for all years following test (using life expectancy of 82 yr37)
Healthy, after treatment		Assumes there is some decrease in utility for 4 mo during iron supplementation (4/12 mo = 0.33)
Poor functional outcomes, untreated		Assumes that iron deficiency is not detected and treated, and resulting health state is experienced for all years following test
Poor functional outcomes, after treatment		Assumes that iron deficiency is not treated despite supplementation, and this health state experiences both decreased utilities from poor functional outcomes, and short-term decrease in utility due to supplementation