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corkee
Calcite | Level 5

Hi, 

 

I am running a logistic regression model (a relatively simple one) and want to know if it's possible to obtain a confidence interval for the effect of age among males.

 

This is my model: 

 

logit(y) = age + male + age*male

 

where male = 1 if male and male = 0 if female. I am not sure if I need a CONTRAST statement in PROC LOGISTIC. I know I need the variance-covariance matrix, but I am not sure how to obtain it using SAS. However, it would be ideal if I could somehow obtain the 95% CI without having to do the calculations by hand using the variance-covariance matrix.

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