Hi everyone,
I have some doubts with regard to missing data and incomplete twin pairs and I do not know what is the best option.
For example, If I am fitting a bivariate model what should I do with one twin pair where one of the twins does not have the information for one of the variables? I mean if the bivariate twin analysis is with variable1 and variable 2 and one twin does not have the information for variable 1. Also, what should I do if one twin pair does not have information for variable 1 but does for variable 2.
Finally, what should I do with unpaired twins, should I remove them from my data set? I would like to know how the program treat missing data and unpaired twins and what is the correct option.
Thank you so much