|
Prior probability (odds): |
31% (0.5) |
|
POSITIVE TEST: |
Positive Likelihood ratio: |
1.44 |
95% confidence interval: |
[1.18,1.75] |
Posterior probability (odds): |
40% (0.7) |
95% confidence interval: |
[35%,44%] |
(~ 1 in 2.5 with positive test |
are sick) |
|
NEGATIVE TEST: |
Negative Likelihood ratio: |
0.24 |
95% confidence interval: |
[0.08,0.72] |
Posterior probability (odds): |
10% (0.1) |
95% confidence interval: |
[4%,25%] |
(~ 1 in 1.1 with negative test |
are well) |
|
Odds = Probability / (1-Probability) |
+LR = Sensitivity / (1 - Specificity) |
-LR = (1 - Sensitivity) / Specificity |
Posterior Odds = Prior Odds x LR |
|