[R] Summary values from Glm function (rms package)

Yonghao puayonghao at gmail.com
Thu Mar 22 04:13:01 CET 2012

Dear fellow R-users,

I’m using the Glm function (gamma family of distributions) from the rms
package to compare 2 groups on costs data. Although the summary function
does provide the mean cost difference and  standard errors, I believe these
values were in the (natural) log ratio format. Is there a function to
express these values into the original scale of the response variable (i.e.,
dollars) such that I could obtain the mean adjusted cost difference (and the

Many thanks to everyone in advance!


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