topic Re: Repeated measures in one patient in SAS Health and Life Sciences

Repeated measures in one patient

deleted_user — Wed, 01 Oct 2008 07:50:41 GMT

I have a question regarding the validity of a statistical test. If we take N randomly sample from a laboratory sample of the same patient and we obtain N values of the same parameter before the treatment and then we repeat the same thing some time later, after the treatment, is it correct to perform an unpaired test between the N values before treatment and N values after the treatment, in one patient? Is this a valid way to prove efficacy, or the repeated measure of a parameter in one patient is rather a reliability measurement?

Thank you for your help.

Re: Repeated measures in one patient

Doc_Duke — Tue, 07 Oct 2008 23:33:05 GMT

You can analyze them as unpaired. Your universe is the one patient and what you are really doing is testing the consistency of result under two different treatment condition.

It's not generalizable beyond that one patient, but you can do it.

Doc Muhlbaier
Duke

Re: Repeated measures in one patient

deleted_user — Wed, 08 Oct 2008 06:32:16 GMT

Thank you for your help!

Ela