Decision Tree

1) Do Not Treat

2) Treat

3) Test first, then treat if + (positive), and donít treat if ñ (negative)

Test has .90 sensitivity and .90 specificity for D

Options Events Death Mortality

1) Do not Treat D 50 25 25%

D 50 0

2) Treat D 50 10 20%

D 50 10

+ TP 45 9

3) Test FP 5 1 11%

ñ TN 45 0

FN 1

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