Global test for categorical variable after a log-binomial regression

[Valerie Briand]

Hello,

I am analyzing data with a log-binomial regression using the following command (Stata 13):

glm y x x x, fam(poisson) link(log) vce(robust) nlog eform

Some of the x variables are categorical with more than 2 classes.
I would like to test their global significance (ie, one P value for all the classes).
Why command should I use ? Something like "testparm"

Thank you in advance for your help.

Best regards,
Valerie

[Maarten Buis]

Did you try testparm? Did it give you results you did not expect? Do you have reasons to believe that testparm is not correct?