Background Many lesbian, gay and bisexual (LGB) individuals continue to experience unique challenges, such as the lack of family support and access to same-sex marriage. This study examines the effect of the introduction of same-sex marriage in the UK (2013–14) on mental health functioning among sexual minorities, and investigates whether low family support may hamper the positive effects of marriage equality legislation among LGB individuals. Methods This analysis included LGB participants (n = 2172) from the UK household longitudinal study waves 3–7, comprising two waves before and two waves after marriage equality legislation passed in England, Wales and Scotland. Individual-level mental health functioning was measured using the mental component score (MCS-12) of the Short Form-12 survey. Fixed-effect panel linear models examined the effect of marriage equality on MCS-12 across varying family support levels. Analyses included adjustment for covariates and survey weights. Results Legalization of same-sex marriage was independently associated with an increase of 1.17 [95% confidence interval (CI): 0.28–2.05] MCS-12 in men and 1.13 (95% CI: 0.47–2.27) MCS-12 in women. For men, each additional standard deviation of family support modified the effect of legalization on mental health functioning by +0.70 (95% CI: 0.22–1.18) MCS-12 score. No interaction was found in women. Conclusions Our findings provide evidence that same-sex marriage will likely improve LGB mental health functioning, and these effects may be generalizable to other European countries. Since male sexual minorities with low family support benefited the least, additional interventions aimed at improving family support and acceptance of this group is required to help reduce mental health disparities.

中文翻译：

---

家庭支持改变了同性婚姻立法改变对 LGB 心理健康的影响：来自英国队列研究的证据

背景 许多女同性恋、男同性恋和双性恋 (LGB) 个体继续面临独特的挑战，例如缺乏家庭支持和获得同性婚姻的机会。本研究考察了英国（2013-14 年）引入同性婚姻对性少数群体心理健康功能的影响，并调查低家庭支持是否会阻碍婚姻平等立法对 LGB 个体的积极影响。方法 该分析包括来自英国家庭纵向研究第 3-7 波的 LGB 参与者（n = 2172），包括英格兰、威尔士和苏格兰通过婚姻平等立法之前的两波和之后的两波。使用 Short Form-12 调查的心理成分评分 (MCS-12) 测量个人水平的心理健康功能。固定效应面板线性模型检查了婚姻平等对不同家庭支持水平的 MCS-12 的影响。分析包括对协变量和调查权重的调整。结果 同性婚姻合法化与男性 MCS-12 增加 1.17 [95% CI: 0.28–2.05] 和女性 MCS-12 增加 1.13 (95% CI: 0.47–2.27) 独立相关。对于男性，家庭支持每增加一个标准差，合法化对心理健康功能的影响就会增加 +0.70（95% CI：0.22–1.18）MCS-12 得分。在女性中没有发现相互作用。结论 我们的研究结果提供的证据表明，同性婚姻可能会改善 LGB 的心理健康功能，这些影响可能会推广到其他欧洲国家。由于家庭支持少的男性性少数群体受益最少，