Hi SAS Community, I am using PROC FMM (running under SAS V9.4_M5 and SAS/STAT V 14.3) to explore factors affecting counts of hospital admissions (and other similar events) for children in a large birth cohort. As the vast majority of children in the study population do not attend hospital or experience the other events, I have lots of zero counts in the data. I have found very useful tips in the SAS documentation for running zero-inflated poisson and negative binomial regression models and assessing how well those models estimate the count profiles within the data (eg usage notes 43522 and this SAS Global Forum 2008 paper. However, to extend the analysis to hurdle models (eg by using the %NLEstimate macro or generating plots as demonstrated in the 2008 paper) I need to pass parameters to SAS pdf function for truncated poisson and truncated negative binomial distributions. I have run hurdle models in PROC FMM using these distributions but haven't been readily able to assess their fit or generate estimates for different covariate profiles as I can do for other distributions. To date, I have not been able to locate the correct syntax or other documentation to generate pdf estimates for truncpoisson or truncnegbin distributions. Can anyone on this forum point me in the right direction to find this documentation? Many thanks in advance
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