Chalk Talk: Proportions and Rates as Dependent Variables

Kim, Yoonsang. (2014, Jan. 14).  What You Need to Know about Proportions and Rates as Dependent Variables. Institute for Health Research and Policy, University of Illinois at Chicago.

What would you do when the variable of interest is continuous and restricted to the interval (0,1)? A linear regression assuming normality may not work because of the restricted range. Regression models for proportions and rates include beta regression and fractional logit regression. This Chalk Talk introduced these two approaches and reviewed their estimation methods, interpretation of parameters, and related statistical software.

View Dr. Kim's presentation. (PDF) 

MRC Chalk Talks are informal educational seminars about current methodological issues hosted by the IHRP Methodology Research Core, usually held on the second Tuesday of the month at 1 p.m.

Health researchers at all levels of experience, including postdoctoral fellows and doctoral students designing their own studies, are welcome.