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st: adjusted means


From   Rachele Capocchi <[email protected]>
To   [email protected]
Subject   st: adjusted means
Date   Tue, 23 Oct 2007 10:09:44 +0200

Dear Stata users,

I have some problems with the adjusted means.
I did the adjusted means on quantitative variable (_8pgf2a) by group var ( gruppi_ord) adjusting for uri_enz_creat_mg24h.

xi: regress _8pgf2a i.gruppi_ord uri_enz_creat_mg24h
adjust uri_enz_creat_mg24h , by( gruppi_ord)

RECODE of |
gruppi | xb
----------+-----------
* 0 | 1309,4*
1 | 1027,86
* 2 | 1068,04*


Then I need to do the same, considering the sex.
anova _8pgf2a gruppi_ord uri_enz_creat_mg24h if sesso==1, continuous( uri_enz_creat_mg24h)
adjust uri_enz_creat_mg24h , by( gruppi_ord)

RECODE of |
gruppi | xb
----------+-----------
* 0 | 1359,01*
1 | 994,102
* 2 | 1127,67*
anova _8pgf2a gruppi_ord uri_enz_creat_mg24h if sesso==2, continuous( uri_enz_creat_mg24h)
adjust uri_enz_creat_mg24h , by( gruppi_ord)

RECODE of |
gruppi | xb
----------+-----------
* 0 | 1424,16*
1 | 1261,85
* 2 | 1237,97
*

*How is it possible ? The overall means are not between the two value of sex.*

Best Regards,

Rachele
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