Sample Proportion of Cases

Use this text box to specify the proportion of the individuals in the sample that are considered cases . Values specified here must be between 0 and 1.0 . The default value is 0.5 (half the individuals serve as cases and half serve as controls).

Note : The proportion of controls is equal to 1.0 minus the proportion of cases .

To Specify the Proportion of the Sample that are Cases:

Left-click in the text field and type the desired value.