Hello,

I am looking at data on child survival from a survey with a stratified
two-stage design. I have been trying out the excellent survey package, with
which I have done a descriptive analysis and Cox models. I need to calculate
rates (with a child-year denominator) and various rate ratios plus
confidence intervals (basically, something like the STATA commands strate
and stmh used after svyset and stset) but haven't been able to find a
convenient way of doing this in R despite much searching. Is this possible,
either with the survey package or any other way? Many thanks for any advice.

Paul

-- 

Dr. Paul Cleary,
Specialist Registrar in Public Health,
Chester Health Protection Unit.

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