Likelihood Ratio Calculator
This calculator helps medical professionals determine the likelihood ratio in diagnostic testing, enhancing decision-making processes based on test results.
Calculator
Results
Positive Likelihood Ratio (LR+):
-
Negative Likelihood Ratio (LR-):
-
Data Source and Methodology
Tutti i calcoli si basano rigorosamente sulle formule e sui dati forniti da this source.
The Formula Explained
LR+: \(\frac{\text{Sensitivity}}{1 - \text{Specificity}}\)
LR-: \(\frac{1 - \text{Sensitivity}}{\text{Specificity}}\)
Glossary of Terms
- Sensitivity: The probability that a test correctly identifies a condition.
- Specificity: The probability that a test correctly identifies the absence of a condition.
- LR+: The likelihood that a positive test result is correct.
- LR-: The likelihood that a negative test result is correct.
How It Works: A Step-by-Step Example
Given a test with 90% sensitivity and 85% specificity, the positive likelihood ratio (LR+) can be calculated as follows:
\(LR+ = \frac{90}{1 - 85} = 6\)
Frequently Asked Questions (FAQ)
What is a likelihood ratio?
A likelihood ratio is a value used to determine the accuracy of a diagnostic test.
Why are likelihood ratios important?
They help in understanding how much a test result will change the odds of having a disease.
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
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Variables and units
- No variables provided in audit spec.
Sources (authoritative):
- this source — getthediagnosis.org · Accessed 2026-01-19
http://getthediagnosis.org/calculator.php
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
- Initial audit spec draft generated from HTML extraction (review required).
- Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
- Confirm sources are authoritative and relevant to the calculator methodology.