On Jun 23, 2009, at 6:28 AM, jeweetwel wrote:
Hi,
I am planning to externally validate a logistic prediction model in
a new
cohort. Outcome is mortality. The betacoefficients were derived from a
previous published article. It seems not possible in R to assign
fixed beta
coefficients to predictors like lrm (death ~
intercept+beta1*var1+beta2*var2...). How do i solve this problem?
There is an offset model component for features that are assumed fixed.
--
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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