|From||Ronán Conroy <firstname.lastname@example.org>|
|Subject||Re: st: Adjusting confidence intervals|
|Date||Wed, 13 Oct 2004 14:23:44 +0100|
Ilesh Patel wrote:
Hello.. xi:regress diff_score i.overall_hlth age
I have computed a difficulty score for a range of vision tasks and want to see if there is a difference in the mean score by self-rated overall health (scored from 1 – 4). Following is what I used:
by overall_hlth: ci diff_score
This gives me the mean difficulty score and it’s CI for each of the 4 self-rated overall health groups. What command do I use in Stata to adjust the CI for age given that I think age affects both the difficulty score.