Macro-level determinants of gender differences in the prevalence of major depression and alcohol use disorder in the United States and across Europe

Background: Major depressive disorder (MDD) and alcohol use disorder (AUD) are leading psychiatric causes of burden of disease. Although research has found pronounced gender differences in these disorders, the magnitude of these differences varies substantially between settings. However, integrated analyses of both disorders are lacking, limiting the comparability of findings. Moreover, few studies conceptualize political and socio-cultural characteristics as separate macro-level determinants of gender differences. This paper analyzes the association between gender differences in the prevalence of both MDD and AUD with social policy expenditures and indicators of gender equality.

Methods: Data for adults from the U.S. Behavioral Risk Factor Surveillance System 2006/2008 (n = 234,020) and the European Social Survey 2014 (n = 30,416) were used. Cross-sectional analyses were conducted using modified Poisson regression models adjusted for individual-level and macro-level covariates; multiplicative and additive interaction were evaluated.

Results: Social policy expenditures and support for gender equality were negatively associated with gender differences in AUD in Europe (p < 0.001), with the male excess prevalence varying between 26.1 % at lowest and 9.4 % at highest observed levels of expenditures, and between 23.3 % at lowest and 6.8 % at highest levels of gender equality. In the U.S., state-level reproductive rights were negatively associated with gender differences in AUD (p = 0.036). No equivalent effects were observed for gender differences in MDD.

Conclusion: The prevalence of AUD among men and women tends to converge in settings with higher levels of social policy generosity and gender equality, respectively. This effect does not seem to apply to gender differences in MDD in either setting.