Re: Percent Change Crosstabs

Posted by Ryan on May 29, 2013; 3:49pm
URL: http://spssx-discussion.165.s1.nabble.com/Percent-Change-Crosstabs-tp5720440p5720457.html

Damir,

 

% change in risk  = (RR - 1)*100=[(41.9/48.0) - 1]*100 = -12.7

 

As you can see from the formula above, the test on the [absolute] risk difference, which is what I brought up in previous posts, is not the same as the test on % change in risk.

 

Ryan

On Wed, May 29, 2013 at 8:52 AM, DKUKEC <[hidden email]> wrote:

Thank you Ryan & Bruce, Very much appreciate your replies and suggested syntax. I am looking for the following computations... for example: % Difference in recidivism rate = Treatment Recidivism % - Control Recidivism %. % Change in the recidivism = Difference % / Control Recidivism %. *************************************************************************** 2X2 CROSSTAB EXAMPLE Recidivist Non-Recidivist Total Treatment 816 1133 1949 Control 936 1013 1949 Row % Row % Row % Treatment 41.9% 58.1% 100.0% Control 48.0% 52.0% 100.0% ****** Would like to compute %************************* Difference -6.1% % Change -12.7% ***************************************************** Sincerely, Damir

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