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Re: st: How to get Odds Ratios rather than Relative Risk Ratios from -mlogit-


From   Philip Burgess <philip.burgess.uq@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: How to get Odds Ratios rather than Relative Risk Ratios from -mlogit-
Date   Sat, 19 Sep 2009 11:48:13 +1000

Steve;

Excellent - it all reconciles. Very much appreciate your advice.

Would be good if the online documentation for RRR could make it clear
that RRR = OR in these circumstances.

Again thanks!

Philip

On Sat, Sep 19, 2009 at 1:11 AM,  <sjsamuels@gmail.com> wrote:
> In your 3x3 table,  compute the ORs for the four  2x2 tables  I
> outlined (the baseline predictor category  and baseline outcome appear
> in each) and compare to the corresponding RRRs.
>
> -Steve
>
> On Fri, Sep 18, 2009 at 10:10 AM, Philip Burgess
> <philip.burgess.uq@gmail.com> wrote:
>> Thanks Steve. I'm still a bit confused though.
>>
>> The situation I have is typcially a 3 level outcome category & a 3
>> level predictor category.
>>
>> I looked at the
>> http://www.ats.ucla.edu/stat/stata/output/stata_mlogit_output.htm
>> notes and they say:
>>
>> "However, the exponentiated coefficient are commonly interpreted as
>> odds ratios".
>>
>> But "interpretation" per se is perhaps the easy way out ....
>>
>> Thanks for your thoughts.
>>
>> Philip
>>
>>
>>
>> On Fri, Sep 18, 2009 at 10:53 PM,  <sjsamuels@gmail.com> wrote:
>>> RRRs are ORs for the 2 x 2 table consisting of the baseline outcome
>>> category, baseline predictor category, and the outcome and predictor
>>> categories which index the RRR.  See the mlogit manual 3 x 2 example.
>>>
>>> -Steve
>>> On Fri, Sep 18, 2009 at 12:16 AM, Philip Burgess
>>> <philip.burgess.uq@gmail.com> wrote:
>>>> I have a complex survey design defined as:
>>>>
>>>> svyset _n [pweight=mhsfinwt], jkrweight(wpm0101 - wpm0160)
>>>> vce(jackknife) singleunit(missing)
>>>>
>>>> When I run the following command, I get RRRs:
>>>>
>>>> xi: svy jackknife, nodots : mlogit BAgrp_DX i.isevaus, baseoutcome(1) rrr
>>>>
>>>> I wanting to report ORs - but using -eform- option doesn't seem to work:
>>>>
>>>> xi: svy jackknife, nodots : mlogit BAgrp_DX i.isevaus, baseoutcome(1) eform(or)
>>>>
>>>> Any ideas?
>>>>
>>>> Thanks;
>>>>
>>>> Philip Burgess
>>>> *
>>>> *   For searches and help try:
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>>>> *   http://www.stata.com/support/statalist/faq
>>>> *   http://www.ats.ucla.edu/stat/stata/
>>>>
>>>
>>>
>>>
>>> --
>>> Steven Samuels
>>> sjsamuels@gmail.com
>>> 18 Cantine's Island
>>> Saugerties NY 12477
>>> USA
>>> 845-246-0774
>>>
>>> *
>>> *   For searches and help try:
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>>> *   http://www.stata.com/support/statalist/faq
>>> *   http://www.ats.ucla.edu/stat/stata/
>>>
>>
>> *
>> *   For searches and help try:
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>>
>
>
>
> --
> Steven Samuels
> sjsamuels@gmail.com
> 18 Cantine's Island
> Saugerties NY 12477
> USA
> 845-246-0774
>
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
>

*
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