There was no main effect (χ2Δ = 1.20, 1 df, p = 0.27) or moderating effect of migration (moderation of ACE dropped: χ2Δ = 0.50, 3 df, p = 0.92) on alcohol use frequency among males. For female alcohol use, dropping the main effect caused a significant decrease in goodness of fit (χ2Δ = 4.79, 1 df, p = 0.03). Alcohol use was more frequent in municipalities with higher rates of migration. Like in males, there were no significant moderating effects of migration on genetic or environmental influences on alcohol use frequency in females (moderation of ACE dropped: χ2Δ = 3.22, 3 df, p = 0.36).
