"Two recent studies published in the Archives of General Psychiatry found higher rates of psychiatric disorders among homosexually oriented men and women than among the heterosexual population (Herrell 1999 & Fergusson 1999). Those articles mentioned that a third study, not yet published, had confirmed their findings."
Arch Gen Psychiatry. 2001;58:85-91
Background It has been suggested that homosexuality is associated with psychiatric morbidity...
Results Psychiatric disorders were more prevalent among homosexually active people compared with heterosexually active people.
Conclusion The findings support the assumption that people with same-sex sexual behavior are at greater risk for psychiatric disorders.