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  • $\begingroup$ If you have multiple events per patient you could consider Poisson regression $\endgroup$ Commented Apr 21, 2016 at 20:34
  • $\begingroup$ Interesting questions. What is the distribution of counts for the patient visits? Are you working with panel data? $\endgroup$ Commented Apr 22, 2016 at 4:03
  • $\begingroup$ The distribution looks Poisson, but sometimes (I want to create models more than 1 hospital) it is overdispersed - negbin. re: Panel data - I have more than 1 observation per individual, so the answer is yes? $\endgroup$ Commented Apr 22, 2016 at 6:25