> I tried to calculate sensitivity and specificity, using the diagt command,
> on a subset of records by using the 'if' subsetting. It used all of the
> records, ignoring the 'if' subsetting aspect of the command. I also tried
> using this with an expression which was always false, and it still used
> all records.
>
> The help file for this command states that you can use the 'if'
> subsetting.
>
> Am I going about this incorrectly, or is this an error in the programming?
>
> Thanks,
> Shawn
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