Fig. 2
From: Optimal sequence of tests for the mediastinal staging of non-small cell lung cancer
Influence diagram MEDIASTINET. Chance nodes (ovals), except N2_N3 and MED_Sv, correspond to the laboratory tests that can be performed. Decision nodes (rectangles) correspond to the decision on the treatment and on whether to perform each laboratory test. Utility nodes (hexagons or diamonds) have been grouped into three sets, each one surrounded by an orange rectangle background. The first group represents effectiveness, measured in QALYs. The second group of utility nodes represents cost, measured in €. The third group relates cost and effectiveness. Node λ−1 represents (the inverse of) the willingness to pay