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From |
Michelle <cantibridgian@yahoo.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
RE: st: odds ratio vs. RRR in multinomial logistic regression |

Date |
Wed, 10 Aug 2005 12:40:29 -0700 (PDT) |

Some of the statalist members were kind enough to respond to my inquiry a few months ago about interpreting multinomial logistic regression and the resulting RRR. I received this response about reporting the results: "For the RRR it would be, for example, 'the relative risk of outcome 3 associated with X is 0.85 times the relative risk of outcome 1 associated with X'." This was helpful, but when I wrote it up in my dissertation this way, my advisor has told me that I need to put it in "plain English." Can anyone help me put this sentence into more interpretable language for someone who is not very familiar with RRR? I had already written up a detailed description of where the RRR comes from and then followed it with the results reported as above, but my advisor is still requiring a more intuitive or interpretable sentence. Thank you very much. --- David Harrison <david.harrison@icnarc.org> wrote: > I think your interpretation of the odds ratio is > wrong. It should be "the odds of outcome 1 given X > is true are 2.4 times greater than the odds of > outcome 1 given X is not true." > > For the RRR it would be, for example, "the relative > risk of outcome 3 associated with X is 0.85 times > the relative risk of outcome 1 associated with X." > > David > > -----Original Message----- > From: Michelle [mailto:cantibridgian@yahoo.com] > Sent: 03 June 2005 14:16 > To: statalist@hsphsun2.harvard.edu > Subject: RE: st: odds ratio vs. RRR in multinomial > logistic regression > > > Thanks - this is very helpful. One more question: > > With odds ratios in binary logistic regression, you > can easily interpret the exponentiated coefficient > by > stating that "the odds of outcome 1 are 2.4 times > greater than the odds of outcome 2." > > When I expoentiate the coefficient in multinomial > logistic regression (or use the RRR that is > provided), > I can obviously say "the RRR is .85". But is there > some more easily interpretable way that I can > describe > what this number means, as one could do in binary > logistic regression? For instance, can I make a > statement about the probability of outcomes 3 as > compared to outcome 1? > > Thanks again. > > > * > * 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/ > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com * * 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/

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