Disease Likelihood by a Negative Clue

(Normal test result or absence of a clue)

Disease Initial Negative test Revised Likelihood % Likelihood

D1 75 20% = 15 pts. 50

D2 25 60% = 15 pts. 50

Combinations of probabilities: correct statistical data., e.g., presence of 3 clues, absence of 4th how likely is the diagnosis?

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