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Posted 04-09-2021 12:26 PM
(407 views)

For my research purpose, I am using a sample of 7000 patients. These patients are divided into 3 categories:

Cat1 ( Diabetes+ High BP)

Cat2 ( DIabetes+ Low BP)

Cat3 ( Diabetes+ No BP)

My research objective is to get the mean total healthcare costs in these groups for comparing the differences in their costs.

I analyzed the cost data and I found it to be highly skewed with 24 patients with 0 total costs. After doing the Box-cox test, I found that I should use a generalized linear model with gamma distribution and log link function.

My understanding is that I can get rid of the zero costs and use the the positive costs for PROC GENMOD.

MY dependent variable (total costs is continuous variable) and 8 of my Independent variables are categorical ( nominal) but two independent variables are continuous, so is it appropriate to use GENMOD ?

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Sorry for the confusion. By BP I mean Hypertension. So, the No BP group represents patients with Diabetes only.

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