Specificity Calculator
Calculates specificity, the share of non-diseased cases correctly ruled out. The worked condition keeps the inputs and convention visible for checking.
Set the labeled inputs
Specificity
Reading the planned inputs at the chosen parameters for specificity
Calculates specificity, the share of non-diseased cases correctly ruled out. The named quantity is specificity calculator. This is section 1 of the specificity discussion.
Save the inputs, formula convention, units, exclusions, and unrounded output with this result. This statement is conditional on the specificity setup and section 1.
For specificity, preserve the source definition, the stated units, and the named convention beside the displayed number. A second analyst should be able to reconstruct the same result without guessing which population or setup was intended.
Where the method applies before comparing methods for specificity
Specificity is conditional on non-disease status and changes meaning when the reference standard changes. The named quantity is specificity calculator. This is section 2 of the specificity discussion.
90 true negatives and 10 false positives give specificity .90. This statement is conditional on the specificity setup and section 2.
For specificity, preserve the denominator choice, the stated units, and the named convention beside the displayed number. A second analyst should be able to reconstruct the same result without guessing which population or setup was intended.
When another method fits when the result is reused for specificity
Specificity is conditional on non-disease status and changes meaning when the reference standard changes. The named quantity is specificity calculator. This is section 3 of the specificity discussion.
Save the inputs, formula convention, units, exclusions, and unrounded output with this result. This statement is conditional on the specificity setup and section 3.
For specificity, preserve the comparison group, the stated units, and the named convention beside the displayed number. A second analyst should be able to reconstruct the same result without guessing which population or setup was intended.
A controlled alternative in the worked condition for specificity
Calculates specificity, the share of non-diseased cases correctly ruled out. The named quantity is specificity calculator. This is section 4 of the specificity discussion.
90 true negatives and 10 false positives give specificity .90. This statement is conditional on the specificity setup and section 4.
For specificity, preserve the time boundary, the stated units, and the named convention beside the displayed number. A second analyst should be able to reconstruct the same result without guessing which population or setup was intended.
A related calculation is positive predictive value.
What the result can support before reporting for specificity
Specificity is conditional on non-disease status and changes meaning when the reference standard changes. The named quantity is specificity calculator. This is section 5 of the specificity discussion.
Save the inputs, formula convention, units, exclusions, and unrounded output with this result. This statement is conditional on the specificity setup and section 5.
For specificity, preserve the design boundary, the stated units, and the named convention beside the displayed number. A second analyst should be able to reconstruct the same result without guessing which population or setup was intended.
A check on the stated parameter under the stated model for specificity
Specificity is conditional on non-disease status and changes meaning when the reference standard changes. The named quantity is specificity calculator. This is section 6 of the specificity discussion.
90 true negatives and 10 false positives give specificity .90. This statement is conditional on the specificity setup and section 6.
For specificity, preserve the rounding rule, the stated units, and the named convention beside the displayed number. A second analyst should be able to reconstruct the same result without guessing which population or setup was intended.
Questions about this calculation
For the worked condition, what should be checked before reusing this result for specificity?
Keep the inputs, units, method, exclusions, and unrounded output together. The reported quantity here is specificity calculator.
When software results differ, why might another program return a different number for specificity?
Keep the inputs, units, method, exclusions, and unrounded output together. The reported quantity here is specificity calculator.
Before reporting, when should the calculation be repeated for specificity?
Keep the inputs, units, method, exclusions, and unrounded output together. The reported quantity here is specificity calculator.