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@gmail.com
16144 Sigmond Lane
Lowell, AR 72745
479-751-3616

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