Re: how to test inferiority in SPSS

Posted by la volta statistics on Dec 31, 2011; 10:57am
URL: http://spssx-discussion.165.s1.nabble.com/how-to-test-inferiority-in-SPSS-tp5109102p5112015.html

Hi

SPSS does not have tests for non-inferiority implemented. However, it
is easy to do it yourself, calculating the Ci's and p-values using
formulas you will find on the web. This is, of course,  depending on
what kind of test you plan to do (e.g. comparing categorical data,
comparing continuous data etc.). You always need to have a
non-inferiority margin, defining what would be accepted as 'no
difference'. Normally non-inferiority is established with the CI's

Look up for example: Blackwelder WC. Proving the null hypothesis.
Controlled Clinical Trials 1982; 3:345–353.
or:
http://www.sctweb.org/presentations/2008/DesignandConcept.pdf

Hope this helps, Christian

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la volta statistics
Christian Schmidhauser, Dr.phil.II
Weinbergstrasse 108
CH-8006 Zürich
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email: mailto:[hidden email]
Web: www.lavolta.ch





On Fri, 30 Dec 2011 09:08:12 -0500
  Gene Maguin <[hidden email]> wrote:

> Please define non-inferiority.
> Gene Maguin
>
> -----Original Message-----
>From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf
>Of
> Lunfrankie
> Sent: Thursday, December 29, 2011 9:40 PM
> To: [hidden email]
> Subject: how to test inferiority in SPSS
>
> I would like to test for non-inferiority in SPSS. Would anyone know
>how to
> test non-inferiority in SPSS?
> Do I need to buy the expansion for SPSS for it?
> Please kindly tell me how to do so, thank you very much.
>
> --
> View this message in context:
> http://spssx-discussion.1045642.n5.nabble.com/how-to-test-inferiority-in-SPS
> S-tp5109102p5109102.html
> Sent from the SPSSX Discussion mailing list archive at Nabble.com.
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