MathLivePositive likelihood ratio
The positive likelihood ratio gives how much a positive test result raises the odds of having the condition. It is calculated as sensitivity divided by the false positive rate, one minus specificity, and is used to judge how useful a diagnostic test is.
LR+ = \frac{\mathrm{sensitivity}}{1 - \mathrm{specificity}}What the symbols mean
| positive likelihood ratio, a unitless ratio | |
| proportion of people with the condition who test positive, true positive rate | |
| proportion of people without the condition who test negative, true negative rate |
About this formula
- FieldStatistics
- TopicDiagnostic testing
- LevelUniversity
- Also calledLR+ formula, likelihood ratio positive, positive likelihood ratio diagnostic test, sensitivity over false positive rate, diagnostic likelihood ratio, LR plus
- SourceWikidata Q6547272
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