17k views

What is the difference between GLM and GEE?

Whats the difference between a GLM model (logistic regression) with a binary response variable which includes subject and time as covariates and the analogous GEE model which takes into account ...
2k views

Logistic Regression with dependent observations

I have a dataset that contains 100 different patients over 5 year’s period. Every patient is examined each month with regard to particular illness and marked as healthy or ill (0 or 1). Every person ...
6k views

GEE with exchangeable working covariance vs. assuming independence and using Huber-White standard errors?

I'm analyzing a dataset including 13000 students. Students are clustered into schools/grades. The ICC (intraclass correlation coefficient) shows that students in a same school are correlated. ...
3k views

How does a generalized linear mixed model estimate means and how does this differ from calculating means by hand?

I've recently read a paper which used generalised linear mixed models to estimate mean annual and monthly values for the response variable in the model. The response variable was a normally ...
13k views

What test is appropriate for binary outcome with repeated measures and binary, ordinal and continuous independent variables?

I'm trying to figure out what is the most appropriate statistic test for use with my data and was hoping for some advice. The primary data consists of a binary independent variable (patient test - ...
2k views

Interpreting coefficients of ordinal logistic regression when there is clustering within the data

I have built and refined a regression model using the ordinal package in R. The measure is $0>1>2>3>4>5$ (Yes/No ...
3k views

Interpret effect of adding random effects to ordinal regression (R - ordinal package - clmm)

I know there are already lots of questions around this topic (especially this one and this one) but I haven't really seen anything that directly helps me (It will be obvious I'm not a great ...
105 views

Which ANOVA test to use in this experimental design?

I have an experimental design as follows: Three groups of cakes: treatment A, treatment B, control; Three replicates per cake. They are observed during 10 days for microbial growth. My interest is ...
7k views

Getting the variance-covariance matrix of regression coefficients in GEE

I fitted a GEE model using the function genZcor with user defined correlation matrix. I want to get the var-cov matrix of the regression coefficients. But the ...
55 views

How to isolate the effect of dichotomous predictor?

I want to isolate gender differences in preferences for a particular attribute of a product based on data available about their product purchases. I understand that I have to use a mixed Poisson ...
346 views

GEE with longitudinal, mixed-effect data

I have a data set with a binomial response and am trying to determine the best way to model it. Based off of this post I believe I need to use a GEE vs a mixed effect model since I am interested in ...
1k views

I am making a list of disadvantages of GEE and GLMM for a correlated binary outcome. So far I know that GEE requires a relatively large number of clusters, and that it produces profile curves that ...
128 views

Confidence intervals and hypothesis tests for binary choice data with repeated measures

I have data with two between-subjects factors (each with two levels; bs1 has levels ‘hi’ and ‘lo’, and bs2 has levels ‘happy’ and ‘sad’) and one within-subjects factor (ws1, with levels ‘good’, ‘...