Next, we tested the potential moderating role of social isolation by adding the interaction between “feelings of social isolation” and time to the model (Model 2 in Table 2). As the significant interaction coefficients show, differences between groups were smaller than by living arrangements, and mainly significant during the summer periods. As shown in Fig. 5, individuals who felt extremely socially isolated -i.e. isolation score ≥ 7- reported a lower increase in their alcohol consumption during both summer periods than those with no feelings of social isolation -score= 1-, whereas in the winter period they show similar trends.
