Hello everyone. I am doing the analysis of a pre-post intervention study. The participants were divided into 4 groups and we want to demonstrate the differences in the three measurement moments....1. pre-intervention, 2. post-intervention, and 3. 1-year post-intervention control. Initially, we thought of doing only a Cochrane Q-test and others tell me that a mixed model is better. The response variable is dichotomous, presence or absence of a parasite. Now I am really confused as to what would be the best way to analyze my data. Thank you in advance for your help.