topic Re: Hurdle model for longitudinal data? in Statistical Procedures https://communities.sas.com/t5/Statistical-Procedures/Hurdle-model-for-longitudinal-data/m-p/173829#M8998 <HTML><HEAD></HEAD><BODY><P>I think NLMIXED may be your only option, and even that will be messy.&nbsp; I would start by doing a very careful search of the SAS-L archives (<A href="https://listserv.uga.edu/cgi-bin/wa?A0=SAS-L">https://listserv.uga.edu/cgi-bin/wa?A0=SAS-L</A>) for posts by David Cassell on the topic of zero-inflated and hurdle models using NLMIXED.</P><P></P><P>Steve Denham</P></BODY></HTML> Thu, 10 Jul 2014 12:03:28 GMT SteveDenham 2014-07-10T12:03:28Z Hurdle model for longitudinal data? https://communities.sas.com/t5/Statistical-Procedures/Hurdle-model-for-longitudinal-data/m-p/173828#M8997 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P>I am modeling hospital visits (from a household survey where zero visits <SPAN style="text-decoration: underline;">was</SPAN> an option and accounts for about 70%).</P><P>This is a longitudinal study (3 time points).</P><P>A zero inflated Poisson did not fit the data well.</P><P>Is there a way to calculate a two part model for longitudinal data in SAS?</P><P></P><P>Thank yo</P></BODY></HTML> Wed, 09 Jul 2014 22:29:39 GMT https://communities.sas.com/t5/Statistical-Procedures/Hurdle-model-for-longitudinal-data/m-p/173828#M8997 Sandahl 2014-07-09T22:29:39Z Re: Hurdle model for longitudinal data? https://communities.sas.com/t5/Statistical-Procedures/Hurdle-model-for-longitudinal-data/m-p/173829#M8998 <HTML><HEAD></HEAD><BODY><P>I think NLMIXED may be your only option, and even that will be messy.&nbsp; I would start by doing a very careful search of the SAS-L archives (<A href="https://listserv.uga.edu/cgi-bin/wa?A0=SAS-L">https://listserv.uga.edu/cgi-bin/wa?A0=SAS-L</A>) for posts by David Cassell on the topic of zero-inflated and hurdle models using NLMIXED.</P><P></P><P>Steve Denham</P></BODY></HTML> Thu, 10 Jul 2014 12:03:28 GMT https://communities.sas.com/t5/Statistical-Procedures/Hurdle-model-for-longitudinal-data/m-p/173829#M8998 SteveDenham 2014-07-10T12:03:28Z