Association between same-sex marriage introduction and attitudes towards homosexuality in Europe

Abstract

Abstract Background Existing research suggests a positive relationship between the introduction of same-sex marriage and country-level acceptance of homosexuality across Europe in the first decade of the 21st century. Between 2010 and 2018, another 8 countries in Europe introduced same-sex marriage. Given the well-established association between greater social acceptance of sexual minorities and LGBT health, it is important to continue to monitor the effect of same-sex marriage policies on public attitudes. Methods Using data from waves 1 through 9 of the European Social Survey (ESS), the lagged association between same-sex marriage and acceptance of homosexuality in the subsequent wave was analysed for 12 European countries that introduced same-sex marriage between 2002 and 2018. Acceptance of sexual minorities was assessed using the statement, “Gay men and lesbians should be free to live their own life as they wish”, which was dichotomised into two groups: “agree strongly” or “agree” vs. “neither agree nor disagree”, “disagree”, or “disagree strongly”. The association between same-sex marriage laws and acceptance was analysed in mixed-effects logistic regression models adjusting for country-level and individual-level confounders and survey year. Results On the country level, acceptance of homosexuality ranged from 61% in Portugal in 2006 to 96% in Iceland in 2016. Based on the total sample of 171,683 observations, acceptance increased from 77% in 2002 to 88% in 2018. Preliminary analyses indicate that existence of same-sex marriage at the time of data collection was associated with 24% increased odds of acceptance of homosexuality in fully adjusted models (95% CI: 1.05-1.48). Conclusions This study provides further evidence of an association between same-sex marriage laws and public acceptance of homosexuality. Additional research will be needed in order to further investigate this relationship beyond Western Europe and in relation to sexual minority health and well-being. Key messages For 12 European countries, evidence of an association between the introduction of same-sex marriage between 2002 and 2018, and subsequent accepting public attitudes towards homosexuality was found. Given their role as a key social determinant of health, further research on the association between social norms accepting of sexual minority populations and inclusive social policies is warranted.