[R] qcc package & syndromic surveillance (multivar CUSUM?)

From: <adiamond_at_fas.harvard.edu>
Date: Tue 27 Jul 2004 - 08:07:43 EST


Dear R Community:

I am working on a public health early warning system, and I see that the qcc package allows for CUSUM and other statistical quality tests but I am not sure if my project is a good match for qcc functions as written. Any advice you may have is very much appreciated.

I have four years worth of daily counts of emergency room admissions for different conditions (e.g. respiratory, neurologic, etc) from several local hospitals. the data looks like this...

DAY 1

              Respiratory     Neuro   ...
Hospital A:       10		12

. . .
. . .
Hospital F: 7 14 DAY 2 Respiratory Neuro ... Hospital A: 10 12
. . .
. . .
Hospital F: 7 14 ...

etc.,

and my goal is to do a kind of multivariate quality control test (without fitting a GLM), that would run each day after the data is updated and be able to answer the question:
"Has there been a significant variation in the central tendency of the data?"

An analogous problem would be detecting the early signs of a shift in global trading patterns by examining stock market indexes in different countries around the world, updating and testing the data each business day.

Thank you,

Alexis Diamond



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