Transition probability from gamma distribution result of flexsurv
Cindy Wu
Hello
I have a markov model that requires transition probability as transition parameter. I use the survival data for extrapolation, and selected the gamma distribution. I want to make sure how the shape and rate parameter correspond to the alpha and lambda parameter in Treeage
Comments
Cindy
I would refer you to our Articles: https://www.treeage.com/resources/articles/
Specifically there is an article related to parameterization in survival analysis software and the associated distributions.
One suggestion I can provide involves testing the alpha and lambda parameters by generating the histograms for the distributions you create. Use the "Graph It" button in the Distributions View (as highlighted in the image below) and check the distributions you get from TreeAge match what you had in your survival data.
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