How to Use SPSS for Generalized Estimating Equations

Generalized estimating equations (GEE) are a powerful tool for analyzing repeated measurements or other correlated observations, such as clustered data. GEE extend the generalized linear model to account for the within-subject or within-cluster correlation that is often present in longitudinal or clustered data. In this article, we will show you how to use SPSS for GEE with an example of a randomized controlled trial (RCT) that studied the effects of air pollution on children's respiratory health.

What is GEE?

GEE is a method of estimating the parameters of a generalized linear model when the observations are not independent. For example, in a longitudinal study, the same subjects are measured at different time points, and their responses may be correlated over time. Similarly, in a clustered study, the subjects are grouped into clusters, such as schools or hospitals, and their responses may be correlated within each cluster. GEE takes into account this correlation by specifying a covariance matrix that represents the dependency structure of the data. GEE also provides robust standard errors that are valid even if the covariance matrix is misspecified.




Spss Gee