Prevalence Calculator
Calculates the proportion of a population with an existing condition at a stated time. The worked condition keeps the inputs and convention visible for checking.
Set the labeled inputs
Prevalence
The scale of the output before comparing methods for prevalence
Calculates the proportion of a population with an existing condition at a stated time. The named quantity is prevalence calculator. This is section 1 of the prevalence discussion.
Save the inputs, formula convention, units, exclusions, and unrounded output with this result. This statement is conditional on the prevalence setup and section 1.
For prevalence, 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.
A related calculation is incidence proportion.
The reference quantity when the result is reused for prevalence
Define the case criteria and population denominator before comparing prevalence. The named quantity is prevalence calculator. This is section 2 of the prevalence discussion.
120 cases in a population of 1,000 give prevalence .12. This statement is conditional on the prevalence setup and section 2.
For prevalence, 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.
A compact route to the answer in the worked condition for prevalence
Define the case criteria and population denominator before comparing prevalence. The named quantity is prevalence calculator. This is section 3 of the prevalence discussion.
Save the inputs, formula convention, units, exclusions, and unrounded output with this result. This statement is conditional on the prevalence setup and section 3.
For prevalence, 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.
The boundary of the claim before reporting for prevalence
Calculates the proportion of a population with an existing condition at a stated time. The named quantity is prevalence calculator. This is section 4 of the prevalence discussion.
120 cases in a population of 1,000 give prevalence .12. This statement is conditional on the prevalence setup and section 4.
For prevalence, 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.
How to carry the result forward under the stated model for prevalence
Define the case criteria and population denominator before comparing prevalence. The named quantity is prevalence calculator. This is section 5 of the prevalence discussion.
Save the inputs, formula convention, units, exclusions, and unrounded output with this result. This statement is conditional on the prevalence setup and section 5.
For prevalence, 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.
The quantity this page defines when the sample changes for prevalence
Define the case criteria and population denominator before comparing prevalence. The named quantity is prevalence calculator. This is section 6 of the prevalence discussion.
120 cases in a population of 1,000 give prevalence .12. This statement is conditional on the prevalence setup and section 6.
For prevalence, 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
Before drawing a conclusion, when should the calculation be repeated for prevalence?
Keep the inputs, units, method, exclusions, and unrounded output together. The reported quantity here is prevalence calculator.
For this result, can a boundary value be entered for prevalence?
Keep the inputs, units, method, exclusions, and unrounded output together. The reported quantity here is prevalence calculator.