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st: RE: sensitivity and specificity with CI's


From   Fran Baker <Fran.Baker@newcastle.edu.au>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   st: RE: sensitivity and specificity with CI's
Date   Sat, 16 Jun 2012 11:08:01 +1000

Thanks that's great Paul.

I am looking at a paper by Watkins et al (2001) and trying to match their calculations.

using       diagti 37 6 8 28  goes well except for the 95%CI's of sensitivity and specificity

The paper gives 95%CI's as 
sp = 78%   (65 to 91%)
sn = 86% (75 to 97%)
Have you any idea how these may have been calculated - tried all cii options

Also the prevalence is given as 54%.  Do you know how this is found?

Cheers
Fran

>>> "Visintainer, Paul" <Paul.Visintainer@baystatehealth.org> 15/06/2012 11:41 pm >>>
You can use -diagt-, which provides CIs.  You can also compute the confidence intervals using -ci-, since sensitivity and specificity are proportions

-Paul

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Fran Baker
Sent: Friday, June 15, 2012 9:14 AM
To: statalist@hsphsun2.harvard.edu 
Subject: st: sensitivity and specificity with CI's

Hi 

Is there a command for calculating sensitivity and specificity with CI's?  Have looked and found some but not sure of the quality and there don't appear to be CI's.

Thanks
Fran

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