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Good Positive and Negative Likelihood Ratios

Family History: Likelihood Ratios

Introduction: The data below is assessing the accuracy of reported family history, namely if a patient reports a FHx of disease X, how true is it that his family members have that disease?

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The likelihood ratios of findings for Family History are listed below. See the left navigation bar to change the display.

Pre-Test Probability (Prevalence): %. Post-Test Probability (Predictive Value): %. Switch to display mode.
**Note that calculating probabilities from more than one finding is inherently inaccurate because findings are not independent. (For example, using two positive findings that share a common pathogenesis is likely to overestimate the true probability.)
Good Positive and Negative Likelihood Ratios
FindingResult +LR-LR
[ + ] Family History of Breast Cancer + 0 - 9.30.2
[ + ] Family History of Colon Cancer + 0 - 6.80.4
[ + ] Family History of Heart Disease + 0 - 4.10.5