This utility simulates sampling and prevalence estimation for alternative pooling
strategies for an assumed prevalence value and for a specified level of confidence. The program
runs multiple iterations of sampling and estimation and calculates the mean prevalence and
estimated bias across all iterations. See
the User Guide for more details.
See demonstration analysis
This method estimates prevalence using a method that assumes that test sensitivity and specificity
are both 100%. However, if the true sensivitity and specificity of the test are likely to be less than
100% estimates of the true values can be entered to investigate the potential impact of this assumption
being invalid on the resulting prevalence estimate.
Required inputs for this program are:
Outputs are summarised across all iterations for each strategy entered and presented in a summary
table. The main outputs are:
In addition, detailed results for all iterations for each strategy can be downloaded as a
text file, and histograms of the prevalence estimates can be viewed by clicking on the appropriate icons in
the summary results table.
Data for pool sizes and associated numbers of pools tested should be pasted
into the data submission area. You can enter any number of scenarios to simulate,
with a new row required for each scenario. You must enter at least two columns of data,
labeled "PoolSize" and "Pools". Include a header row containing the names.
Paste data in the space below. Data columns can be
in any order but must include columns labeled "Poolsize" and "Pools". A header row specifying column
names must also be included.
Download example data
About this site
This site was created by Ausvet
with funding from a range of sources.It provides a range of epidemiological tools for the use of researchers and epidemiologists, particularly in animal health. Please send
any comments, questions or suggestions to Evan Sergeant
© 2019 Ausvet