Free MRCP revision | January 2013 paper 1

Question category: Statistics

Which of the following formulae defines the positive predictive value?

(Number of True Positives)/((Number of True Negatives)+(Number of False Positives))

(Number of True Positives)/((Number of True Positives)+(Number of False Negatives))

(Number of True Positives)/((Number of True Positives)+(Number of False Positives))

(Number of True Negatives)/((Number of True Negatives)+(Number of False Negatives))

(Number of True Negatives)/((Number of True Negatives)+(Number of False Positives))

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