https://communities.sas.com/t5/Statistical-Procedures/Calculating-the-POWER-in-crossover-study/m-p/386274#M20086 <P>I have read this paper, but the macro is only for one sided t test. I'm looking for two sided t test.</P><P>Thanks</P> Tue, 08 Aug 2017 14:22:34 GMT alotaibifm 2017-08-08T14:22:34Z https://communities.sas.com/t5/Statistical-Procedures/Calculating-the-POWER-in-crossover-study/m-p/386087#M20075 <P>Hi everyone,&nbsp;</P><P>&nbsp;</P><P>I'm working on a crossover study and I would like to calculate the power to detect the significant difference between the three periods.Is there any micro or codes that I can do that?&nbsp;</P><P>&nbsp;</P><P>The Crossover study has 3 periods and 6 sequences.&nbsp;</P><P>Thanks&nbsp;</P> Mon, 07 Aug 2017 17:20:18 GMT https://communities.sas.com/t5/Statistical-Procedures/Calculating-the-POWER-in-crossover-study/m-p/386087#M20075 alotaibifm 2017-08-07T17:20:18Z https://communities.sas.com/t5/Statistical-Procedures/Calculating-the-POWER-in-crossover-study/m-p/386133#M20077 <P>You may want to look at this paper. It discusses some of the details in using SAS Proc Power, whic is part of SAS/Stat to do power calculations for a couple of different crossover designs. <A href="http://www.pharmasug.org/cd/papers/SP/SP05.pdf" target="_blank">http://www.pharmasug.org/cd/papers/SP/SP05.pdf</A></P> Mon, 07 Aug 2017 20:18:21 GMT https://communities.sas.com/t5/Statistical-Procedures/Calculating-the-POWER-in-crossover-study/m-p/386133#M20077 ballardw 2017-08-07T20:18:21Z https://communities.sas.com/t5/Statistical-Procedures/Calculating-the-POWER-in-crossover-study/m-p/386274#M20086 <P>I have read this paper, but the macro is only for one sided t test. I'm looking for two sided t test.</P><P>Thanks</P> Tue, 08 Aug 2017 14:22:34 GMT https://communities.sas.com/t5/Statistical-Procedures/Calculating-the-POWER-in-crossover-study/m-p/386274#M20086 alotaibifm 2017-08-08T14:22:34Z