W. Canada schools w/ GSAs of 3+yrs consistently reduces suicidal ideation for ALL students regardless of orientation (Int'l Journal of Child Youth Family Studies)

School-Based Strategies to Reduce Suicidal Ideation, Suicide Attempts, and Discrimination among Sexual Minority and Heterosexual Adolescents in Western Canada.

Excerpt from abstract:

Analyses of the province-wide random cluster-stratified 2008 B.C. Adolescent Health Survey (n =21,70 8) compared students in schools with GSAs or policies implemented at least 3 years, and less than 3 years, with those in schools without GSAs or anti-homophobia policies, using multinomial logistic regression, separately by gender. LGB students had lower odds of past year discrimination, suicidal thoughts and attempts, mostly when policies and GSAs had been in place for 3+ years; policies had a less consistent effect than GSAs. Heterosexual boys, but not girls, also had lower odds of suicidal ideation and attempts in schools with longer-established anti-homophobic bullying policies and GSAs. 

Citation

Saewcy EM, Konishi C, Rose HA, Homma Y. School-based strategies to reduce suicidal ideation, suicide attempts, and discrimination among sexual minority and heterosexual adolescents in Western Canada. External  International Journal of Child, Youth and Family Studies 2014;1:89‒112.