R help - Jul 2005 - trend estimation for cohort study

Hi R Users,

I wish to estimate if there is a trend in my relative risk obtained by coxph.
The best i've found is a method from Greenland and Longnecker ( Am J
Epidemiology 1992 vol 135 (11) - p 1301-9 ).
But all I have is my relative risk and their std error. 
Is there a command in R that can do this ?
If there is someone with a better method ?
Thanking you in advance, I look forward your reply.
Claude  

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