Sample Size Determination
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Estimation of Odds Ratio with specified precision.
This utility can be used to calculate required sample size when your objective is to estimate Odds Ratio with a specified precision.
Formula used and other details
Confidence Level %
Enter number between 1 to 99
Required
In percentage. Commonly used values are 95, 99 and 90. Should be between 0.01 to 99.99.
Allowable error or Precision
Enter positive number between 0.01 and 99.99
Required
Relative Margin of error towards both sides of Actual Odds Ratio (In percentage).
Ratio of controls to Cases
Enter value from 0.01 to 9.00
Required
Select any two of these three
Odds Ratio
Proportion of cases exposed
Proportion of controls exposed
Sample Size Required =