topic estimate statement help in Statistical Procedures

estimate statement help

ARC2 — Fri, 23 Aug 2019 02:10:57 GMT

Say a is 4 age groups and b is gender;

I want to compare age group 1 with age group 4 for the same gender.

I think the estimate statements below will get me the means for two groups, but I have no idea how to write the statement that compares the two. Help would be appreciated. Thank you.

Proc glm or genmod or whateverl

class a b c;

model y= a b c;

run;

estimate 'age group 1 female' int 1 a 1 0 0 0 b 0 1;

estimate 'age group 2 female' int 1 a 0 0 0 1 b 0 1;

Re: estimate statement help

StatsMan — Fri, 23 Aug 2019 12:21:54 GMT

Since there is no interaction between age and gender, the difference between age groups will be the same for either gender. Your ESTIMATE or CONTRAST would be

estimate 'age difference' age 1 0 0 -1;

You can get this by differencing the coefficients for the 2nd ESTIMATE statement from your first. The coefficients on the intercept and on GENDER cancel out, leaving you with the coefficients above.