States are grouped based on the years when they implemented same-sex marriage. Wave 1 is states that implemented same-sex marriage policies before 2013, and Wave 2 is states that implemented same-sex marriage policies in 2013 or 2014. There were no overall statistically significantly different trends in suicide attempts in states without same-sex marriage policies relative to those with same-sex marriage policies before implementation of such laws (interaction term between same-sex marriage policies and linear year, 0.001 percentage points; 95% CI, more than −0.001 to 0.001 percentage points) or by wave (wave 1, −0.06 percentage points; 95% CI, −0.1 to 0.03 percentage points; wave 2, 0.01 percentage points; 95% CI, −0.06 to 0.08 percentage points).