st: adjusted means

[Rachele Capocchi <rachele.capocchi@arsanita.toscana.it>]

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
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/