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st: Date: Tue, 30 Mar 2010 20:24:12 +0100

From   "Joseph Onwude" <>
To   <>
Subject   st: Date: Tue, 30 Mar 2010 20:24:12 +0100
Date   Tue, 30 Mar 2010 15:24:13 -0400 (EDT)

Combining the diagnostic accuracy of two analytes:

I have two unrelated analytes [A and B] measured on the same individuals,
which can each differentiate between normal and abnormal outcomes. The AUC
from ROC analysis is 79% and 81% for A and B analytes.

How can I combine the results of performance of both A and B to see if the
AUC increases further, to improve the diagnostic accuracy, using STATA 8.2


Joe Onwude
Springfield Hospital,
Chelmsford, UK



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