Sherry Lipsky wrote:
1) I would like to calculate the age-specific and age-adjusted rates of
hospitalizations among the exposed and unexposed in my population-based
study using Poisson/Negative Binomial models...not just the IRR. Any
ideas how to do this or even if it is possible?
2) Alternatively, how can I obtain an age-adjusted rate just using
standard IR calculations? I seem to only be able to calculate the
unadjusted rate and a M-H RR using the command IR. any options here?
Most of the papers I have read using Poisson analysis report crude rates
without Poisson (although one can calculate CIs with a Poisson
distribution--not sure how to do that in Stata).
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I may not understand you right, but... :
You can estimate age-specific rates by -stptime- after a proper -stset-
and -stsplit- of your data.
"Age-adjusted rates" is an ambiguous concept to me. If you mean
standardized to some standard population (direct standardization), the
command is -dstdize-.
I don't understand what you mean by "papers ... using Poisson analysis
report crude rates without Poisson".
Suggested reading: Chapter 14 in Juul S, 2006. An Introduction to Stata
for Health Researchers. Stata Press.
Hope this helps
Svend
__________________________________________
Svend Juul
Institut for Folkesundhed, Afdeling for Epidemiologi
(Institute of Public Health, Department of Epidemiology)
Vennelyst Boulevard 6
DK-8000 Aarhus C, Denmark
Phone: +45 8942 6090
Home: +45 8693 7796
Email: [email protected]
__________________________________________
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