[R-sig-Epi] Reference group in logistic regression analysis

[Екатерина Кудрявцева]

To someone who could help me:

I am a PhD student, working in the Novosibirsk University, Russia. I
am now using glm() function to do logistic regression analysis.
I cannot understand how the chosen reference group. For example, for the
three genotypes of GG, GC, CC I want to be risk assessed in relation to
the genotype CC, but the program selects the genotype GG. How do I
change the reference group?


Thanks for your time.
Best wishes,
Ekaterina Kudryavtseva
PhD student,
Department of Molecular Biology
Novosibirsk University
Tel: +7-923-185-82-47