I have to calculate a sample size for a logistic regression polytomic multifactorial.
The ordinal response has 3 modalities (mild, moderate, severe)
There are 9 binary (yes/no) variables to include in the model and 1 variable with 3 modalities.
Thanks by advance.
I think that the PROC SAS to do that does not exist yet but i found an article (http://www.childrens-mercy.org/stats/weblog2004/OrdinalLogistic.asp) where there is the formula to calculate the sample size.
Ready to join fellow brilliant minds for the SAS Hackathon?
Build your skills. Make connections. Enjoy creative freedom. Maybe change the world. Registration is now open through August 30th. Visit the SAS Hackathon homepage.