Estimated True Prevalence & Predictive Values
Enter Sample Size
Enter Number Positive
Enter Test Sensitivity (Inputs in percent decimal. eg: 90%=0.9)
Enter Test Specificcity (Inputs in percent decimal. eg: 90%=0.9)
Select Confidence Interval
80%
90%
95%
99%
Confidence interval for apparent prevalence
Confidence interval for true prevalence
Result:
Estimated Apparent Prevalence - Wilson CL[ % CI ]
Estimated True Prevalence - Blaker CL[ % CI ]
Positive Predictive Value
Negative Predictive Value
Likelihood ratio +ve
Likelihood Ratio -ve
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