Posted by
khaaver on
Dec 12, 2011; 6:23am
URL: http://spssx-discussion.165.s1.nabble.com/Odds-Ratio-Adjusted-OR-tp5065253p5067336.html
Regardless of the size of the OR, we have seen many IV pointed out by
the 2X2 losing their significance when put into LR in multivariate
analysis. This is why, those statisticians working in medicine or
medical research would never recommend anything to be quoted as a
"finding" without performing multivariate analysis, which makes sense.
Secondly, you should use the results in accordance with the scientific
sense of the problem at hand. Here it seems the two IV's are in favour
of "No Alcohol" use in LR. If you are confident that your data is
clean, the procedure your performed is correct, underlysing
assumptions for the tests are met, report the results with the
scientific sense.
On 11/12/2011, John <
[hidden email]> wrote:
> 1. I followed Bruce's suggestion and changed the dependent variable
> (Alcohol use) 's codes to 0 (=Yes) and 1 (=No) and changed the codes of
> all IV so that 0 is present as the first category in each variable.
>
> I got the same results as before. No change.
>
>
> 2. I could do OR for each one of the IVs from logistic regression also.
> But, that's not the problem here. When I did ORs from cross tabs, I
> verified it using hand calculator - the ORs from cross tabs were correct.
> In short, the OR numbers are correct.
>
> What I am trying to achieve is correct AORs. The obvious problem is - I
> haven't seen such a big difference between OR and AOR ever. I am not
> fairly experienced, but experienced statisticians and SPSS masters here
> know better than me. That's why I approached you all.
>
>
> Group, Please suggest. In short, I am presenting my problem again: Is a
> difference of 2.8 (OR = 3.54, AOR = .74) for cigarette smoking and 0.8 (OR
> = 1.74, AOR = 0.83) possible? Have you seen such big differences before?
>
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