Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: calcuating unadjusted and adjusted means


From   "Fitzmaurice, Ann E." <a.e.fitzmaurice@abdn.ac.uk>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: calcuating unadjusted and adjusted means
Date   Sun, 15 May 2011 15:01:44 +0100

Hi
I  run a regression and want to calculate the unadjusted and adjusted means of the sample included in the regression

I run the following where the variable bir_grp has four categories  was entered in the regression as i.bir_grp2 (sample_mod5 has previously been calculated)
Regress ............
predict xb
rename xb pred_m5
 mean pred_m5 if sample_mod5 ==1 , over (bir_grp2)

 adjust if sample_mod5==1, by (bir_grp2)

after this command I get an error message " variable miscbirth not found"

mean babywt2  if sample_mod5==1 ,over (bir_grp2)

This gives means  for the four groups which are identical between the two methods that work , but the confidence intervals are different,

Can  anyone advise how to calculate the group means before and after regression

Thanks

Ann

Ann E Fitzmaurice


The University of Aberdeen is a charity registered in Scotland, No SC013683.

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index