[R] Sensitivy / Specificity and nulls

Bert Gunter gunter.berton at gene.com
Wed Aug 28 16:25:12 CEST 2013


This is not an R question. Post elsewhere. Better yet, contact a local
statistical consultant.

-- Bert

On Wed, Aug 28, 2013 at 7:18 AM, Donald Catanzaro <dgcatanzaro at gmail.com> wrote:
> Good Day All,
>
> I am working with a diagnostic test and comparing the new test to an old
> test.  Normally I would be able to calculate sensitivity and specificity
> quite easily.
>
> However, the 'gold standard' that I am comparing my new diagnostic with is
> really 'gold-plated' in that sometimes the 'gold standard' fails completely
> and I have no data from the 'gold standard' but I might have data from the
> diagnostic test.  Of course sometimes my new diagnostic fails but I have
> data from my 'gold standard'
>
> To me this really starts moving towards classification but I cannot seem to
> find the appropriate calculations.
>
> Can someone point me to some web resources to determine the appropriate
> method to be able to deal with the NULLs ?  Resources within the medical
> realm would be better (because the rest of the folks would understand them
> better) but not required.
>
> --
> - Don
>
> Donald Catanzaro PhD
> dgcatanzaro at gmail.com
> 16144 Sigmond Lane
> Lowell, AR 72745
> 479-751-3616
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.



-- 

Bert Gunter
Genentech Nonclinical Biostatistics

Internal Contact Info:
Phone: 467-7374
Website:
http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm



More information about the R-help mailing list