Morten Frisch and Jacob Simonsen report on risk of suicide for same-sex married people relative to opposite-sex married people in Denmark.
Morten Frisch and Jacob Simonsen, "Marriage, cohabitation and mortality in Denmark: national cohort study of 6.5 million persons followed for up to three decades (1982–2011)," International Journal of Epidemiology 42, no. 2 (April 2013): 559-578
Mortality was markedly elevated among persons in same-sex marriage in the first decade after its introduction in 1989. Since the year 2000, mortality among same-sex married women has remained higher than in all other marital status categories, with a tendency towards increasing HRs in recent years. In contrast, mortality among same-sex married men has reached a level below that of unmarried and divorced men and similar to that of widowed men (HR around 1.4 in 2011).