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From |
Richard Williams <richardwilliams.ndu@gmail.com> |

To |
statalist@hsphsun2.harvard.edu, "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |

Subject |
Re: st: Problem with setting the right reference category when using mlogit |

Date |
Thu, 04 Oct 2012 17:44:18 -0500 |

At 04:17 PM 10/4/2012, Amal Khanolkar wrote:

Hi, I've been running some multinomial logistic regression models using mlogit. My dependent variable has three categories as follows: tab moth_wtgainbybmi mother's weight gain by | pre-pregnancy BMI, IOM | guidelines | Freq. Percent Cum. ------------------------+----------------------------------- Weight gain low | 51,716 22.37 22.37 Weight gain appropriate | 66,311 28.68 51.05 Weight gain high | 113,164 48.95 100.00 ------------------------+----------------------------------- Total | 231,191 100.00 When I run an mlogit model as follows:mlogit moth_wtgainbybmi i.race age i.education i.smoking heighti.parity married, rrr, if plural==1the model automatically sets 'weight gain high', the third categoryin the above variable as the base outcome. I however would like thesecond category, 'weight gain appropriate' to be the 'base outcome'.The three categories above are coded as 0, 1, 2.Even if I recode the variable, such that weight gain appropriate==1,weight gain low==2 and weight gain high==3,the latter, 'weight gain high' still gets set as the 'base outcome'in the mlogit model.How do I change my reference category in the above model?(and strangely enough, I do NOT have the same problem if I useanother categorical variable as a dependent variable in the above model).Thanks, /Amal * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

------------------------------------------- Richard Williams, Notre Dame Dept of Sociology OFFICE: (574)631-6668, (574)631-6463 HOME: (574)289-5227 EMAIL: Richard.A.Williams.5@ND.Edu WWW: http://www.nd.edu/~rwilliam * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**References**:**st: Problem with setting the right reference category when using mlogit***From:*Amal Khanolkar <Amal.Khanolkar@ki.se>

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