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st: mhodds question


From   Igor Schein <igor@txc.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: mhodds question
Date   Mon, 18 Apr 2005 13:58:58 -0400

Hi,

I am trying to make sense out of the following output.   

\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
. mhodds cc gbrfed2, by(moslbir2)

Score test for trend of odds with gbrfed2
by moslbir2

(The Odds Ratio estimate is an approximation to the odds ratio
for a one unit increase in gbrfed2)

-------------------------------------------------------------------------------
 moslbir2 | Odds Ratio        chi2(1)         P>chi2       [95% Conf. Interval]
----------+--------------------------------------------------------------------
 >=12 mon |   0.817831           1.30         0.2537         0.57901    1.15515
 <12 mont |   0.470904           1.40         0.2366         0.13530    1.63894
-------------------------------------------------------------------------------

    Mantel-Haenszel estimate controlling for moslbir2
    ----------------------------------------------------------------
     Odds Ratio    chi2(1)        P>chi2        [95% Conf. Interval]
    ----------------------------------------------------------------
       0.786306       2.00        0.1568         0.563709   1.096803
    ----------------------------------------------------------------

Test of homogeneity of ORs (approx): chi2(1)   =    0.70
                                     Pr>chi2   =  0.4031
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\

I have 2 questions:

1) Odds ratio is less than 1 and 95% confidence interval contains
one.  P value of 0.4031 also indicates insignificant results.  What
would you recommend me to do in such situation to be able to still
draw some meaningful conclusions?

2) Can I draw any conclusions on measure of dose response here, or do
I need to use tabodds separately for that? 

Thanks in advance.

Igor
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