I am working on a project that requires the usage of GEE for statistical analysis. The idea is to compare to groups that either use an intervention or not and see whether injuries differ between groups. I have read previous literature that uses GEE but I have not found any tutorial on how to perform the analysis properly.
Is there any tutorial out there or some guide on how to perform this kind of analysis for comparison of injuries?
The reference paper is this:
Åkerlund I, Waldén M, Sonesson S, Lindblom H, Hägglund M. High compliance with the injury prevention exercise programme Knee Control is associated with a greater injury preventive effect in male, but not in female, youth floorball players. Knee Surg Sports Traumatol Arthrosc. 2022 Apr;30(4):1480-1490. doi: 10.1007/s00167-021-06644-2. Epub 2021 Jul 2. PMID: 34213586; PMCID: PMC9007760.
Performing a Generalized Estimating Equations (GEE) analysis in SPSS involves several steps. Here's a simplified guide:
1. Open Data and Select Variables:
- Open your dataset in SPSS.
- Select the variables you need for the GEE analysis, including the dependent variable (injuries) and any relevant independent variables.
2. Navigate to the GEE Procedure:
- Go to "Analyze" in the top menu.
- Choose "Generalized Estimating Equations."
3. Specify the Model:
- Move the dependent variable (injuries) to the "Dependent" box.
- Add the independent variables to the "Covariates" box.
4. Specify the Repeated Statement:
- Click on the "Repeated" button.
- Select the grouping variable (e.g., subjects, time) and the working correlation matrix (e.g., exchangeable, unstructured).
5. Specify Link Function and Distribution:
- Choose the link function (e.g., identity, logit) based on your data's characteristics.
- Select the distribution appropriate for your dependent variable (e.g., normal, binomial).
6. Specify Additional Options:
- Depending on your needs, you may want to adjust settings under the "Options" tab. This could include choosing estimation methods or specifying convergence criteria.
7. Run the Analysis:
- Click "OK" to run the GEE analysis.
8. Interpret Results:
- Examine output tables, including parameter estimates, standard errors, and significance levels.
- Pay attention to the coefficients and their confidence intervals.
Other point, your specific analysis might require adjustments based on your research questions and data characteristics. for further informations or collaboration contact me [email protected]