Sample size for 2-stage Risk-based Surveillance
Enter Relative risk
Enter Population proportion in High risk group (Inputs in percent decimal. eg: 10%=0.1)
Enter Surveillance proportion in High risk group (Inputs in percent decimal. eg: 10%=0.1)
Enter Herd-level design prevalence (Inputs in percent decimal. eg: 5%=0.05)
Enter Animal-level design prevalence (Inputs in percent decimal. eg: 10%=0.1)
Enter Test Sensitivity (Inputs in percent decimal. eg: 90%=0.9)
Enter Target Herd-Sensitivity (Inputs in percent decimal. eg: 90%=0.9)
Enter Target Surveillance Sensitivity (Inputs in percent decimal. eg: 90%=0.9)
Result:
High-risk Herds
Low-risk Herds
Risk-based Total
Animals to test per Herd
Total Animals to Test
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