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Pretest odds

Authoring team

  • this is defined as the odds that the patient has the target disorder before the test is undertaken
    (pretest probability/[1-pretest probability])

Note that pretest probability is defined as

([a+c]/[a+b+c+d])

where:

target disorder present

target disorder absent

test result positive

a

b

test result negative

c

d


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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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