[R] How to assign fixed beta coefficients in lrm for external validation

jeweetwel sw237 at hotmail.com
Tue Jun 23 12:28:35 CEST 2009


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?

Thank you in advance.

Joey L
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