Diagnostic test

[iheb bougmiza]

hello,
I have two diagnostic tests (1 and 2) for whom I have calculated the sensitivity, specificity, PPV and NPV Each on was compared to a gold standard test.
Is there a statistical test that would say which one of the two tests is better and should be used in practice? thank you in advance

Iheb


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[SR Millis-3]

You could compare their ROC AUCs.



Scott R Millis, PhD, MEd, ABPP (CN,CL,RP), CStat
Professor & Director of Research
Dept of Physical Medicine & Rehabilitation
Wayne State University School of Medicine
261 Mack Blvd
Detroit, MI 48201
Email:  [hidden email]
Tel: [phone]
Fax: [phone]


--- On Sat, 8/30/08, Iheb Bougmiza <[hidden email]> wrote:

> From: Iheb Bougmiza <[hidden email]>
> Subject: Diagnostic test
> To: [hidden email]
> Date: Saturday, August 30, 2008, 8:18 AM
> hello,
> I have two diagnostic tests (1 and 2) for whom I have
> calculated the sensitivity, specificity, PPV and NPV Each
> on was compared to a gold standard test.
> Is there a statistical test that would say which one of the
> two tests is better and should be used in practice? thank
> you in advance
>
> Iheb
>
>
>
> _____________________________________________________________________________
>
> Envoyez avec Yahoo! Mail. Une boite mail plus intelligente
> http://mail.yahoo.fr
>
> ====================To manage your subscription to SPSSX-L,
> send a message to
> [hidden email] (not to SPSSX-L), with no body
> text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the
> command
> INFO REFCARD

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[Marta Garcia-Granero]

Hi

> --- On Sat, 8/30/08, Iheb Bougmiza <[hidden email]> wrote:
>
> From: Iheb Bougmiza <[hidden email]>
> Subject: Diagnostic test
> To: [hidden email]
> Date: Saturday, August 30, 2008, 8:18 AM
>
> I have two diagnostic tests (1 and 2) for whom I have
> calculated the sensitivity, specificity, PPV and NPV Each
> on was compared to a gold standard test.
> Is there a statistical test that would say which one of the
> two tests is better and should be used in practice? thank
> you in advance
>

SR Millis escribió:
> You could compare their ROC AUCs.
>
You can use ROC Analizer, a freeware program for that. It can still be
found in some ftp servers (google for it). If you can't find it, then
tell me and I'll e-mail it to you.
If both diagnostic tests have been tested on the same people, then you
can use SCRN.exe, part of the freeware package PEPI 4.0 to compare them.

HTH,
Marta García-Granero

--
For miscellaneous statistical stuff, visit:
http://gjyp.nl/marta/

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