Enter the sensitivity and specificity into the calculator to determine the likelihood ratio.
Likelihood ratio Formula
The following formula is used to calculate a likelihood ratio.
Positive LR = SE / (100- SP)
Negative LR = (100 – SE) / SP
- Where LR is the likelihood ratio
- SE is the sensitivity
- SP is the specificity
In this case the positive LR tells you how much to increase the probability of having a disease given that someone receives a positive disease test result. Negative LR tells you how much to decrease the probability given a negative test result.
Likelihood Ratio Definition
A likelihood is defined as the probability that a patient has a disease given the result of a test.
Likelihood Ratio Example
How to calculate a likelihood ratio?
- First, determine the sensitivity.
Calculate or measure the sensitivity of the specific test.
- Next, determine the the specificity.
Calculate or measure the specificity of the test.
- Finally, calculate the likelihood ratio.
Calculate the ratio using the equation above.
FAQ
A likelihood ratio describes the rate or chance that a person has a condition given the result of a specific test.
Related Terms
likelihood ratio calculator |
likelihood ratio formula |
how to calculate likelihood ratio |
likelihood ratio |
likelihood ratio test |
positive likelihood ratio |
lr test |
negative likelihood ratio |
lrt test |
likelihood ratio statistic |
likelihood ratio chi square |
monotone likelihood ratio |
likelihood ratio interpretation |
likelihood ratio test calculator |
likelihood ratio test statistic |
likelihood test |
likelihood ratio nomogram |
likelihood ratio test logistic regression |
likelihood ratio definition |
likelihood ratio test chi square |
positive and negative likelihood ratio |
likelihood ratio equation |
pretest odds |
maximum likelihood ratio |
likelihood ratio test formula |
likelihood ratio example |
maximum likelihood ratio test |
likelihood ratio explained |
positive likelihood ratio definition |
the likelihood ratio test |
define likelihood ratio |
lrt statistic |
sensitivity specificity likelihood ratio |
likelihood ratio diagnostic test |
likelihood ratio statistics for autoregressive time series with a unit root |
likelihood ratio logistic regression |
likelihood ratio chi square statistic |
likelihood ratio test excel |
chi square likelihood |
likelihood ratio test definition |
likelihood ratio test regression |
chi square likelihood ratio test |
ratio test statistics |
likelihood ratio probability |
roc curve likelihood ratio |
monotone likelihood ratio test |
likelihood ratio in forensic science |
likelihood ratio post test probability |
likelihood ratio nomogram calculator |
likelihood ratio medicine |
posttest odds |