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st: 'adjusted' poisson regression/ data organization?
From
"Hoffman, George" <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: 'adjusted' poisson regression/ data organization?
Date
Mon, 17 Oct 2011 12:13:31 -0500
I have on events data organized as counts per operator, and with an overall severity factor for the whole exposure cohort
Operator #events #exposures severity
1 4 210 7.1
2 0 605 2.4
3 1 1012 5.6
....
I want to test the 'severity'-adjusted incidence of events by operator with a confidence interval for the estimate.
Do I have to expand my dataset to 'long' format to do this?
I tried poisson events i.operator#c.severity, expo(exposures)
But this did not converge; if I leave out the interaction I can't estimate the operator-specific severity-adjusted event rate.
I know this is basic for most people but I rarely work with this sort of dataset or counts.
Thank you in advance...
George Hoffman
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