I have an observational study data set where some people have one measurement and some have 2 or 3. I don't care about the order of the measurements, nor longitudinal trend. I just want to get results without throwing out data - descriptive stats for categorical & continuous variables, and an unadjusted measure of association (binary*binary variable).
Can I use a weighted average for descriptive stats? For measure of association, I can't find recommendations for this situation. I do not want to analyze longitudinal trend. Can someone provide guidance?