Third, back to the COVID cohort, a potential role of living arrangement as moderator was tested by adding interactions between living arrangement and each time point of the lockdown period to the main-effects FE model. Additionally, the moderating role of subjective feelings of isolation was tested by adding an interaction between social isolation and the lockdown period. Again, based on this model, the predicted alcohol consumption at each time point for these subgroups of individuals was estimated. All analyses were carried out with Stata 13.
