[R-sig-ME] Extracting significance for fixed effect

[Rob Forsyth]

A hopefully simple query. I have an nlme model based on the SSlogis()  
function in which I am testing for a fixed effect of GROUP on xmid. I  
can see the p value of xmid.GROUP in the summary() but what is the  
syntax to extract this as a variable for further use?

thanks

Rob