Fig. 3: Decision tree model.
From: Cost-effectiveness analysis of screening for congenital Chagas disease in a non-endemic area
The figure depicts the decision-analytic framework used to compare a targeted screening strategy with a no-screening strategy over a lifetime horizon. The model begins at a decision node (square), representing the choice between implementing a screening program for pregnant women from Chagas-endemic countries or not screening. Each branch leads to chance nodes (circles), which represent clinical or epidemiological events with assigned probabilities. Terminal nodes (triangles) represent the end of each modeled pathway, where cumulative costs and health outcomes are calculated.
