Suicide and sexual orientation: a critical summary of recent research and directions for future research.

Research on the hypothesized relationship between sexual orientation and suicide is limited both in quantity and quality. National or statewide data on the frequency and causes of completed suicide in gay and lesbian people in the general population, including youth, do not exist. Similarly, national or statewide data on the frequency of suicide attempts among the general population or among gay and lesbian people, including youth, do not exist. Methodological limitations in the small research literature include a lack of consensus on definitions for key terms such as suicide attempt and sexual orientation, uncertain reliability and validity of measures for these terms, nonrepresentative samples, and a lack of appropriate nongay and/or nonclinical control groups for making accurate comparisons. These numerous methodological limitations prevent accurate conclusions about the role sexual orientation might play in suicidal behavior; the limitations also suggest opportunities for future research. Furthermore, recent evaluations of some school suicide-awareness programs suggest that these programs are ineffective and may actually have unintended negative effects. The premature dissemination of unproven programs is unwarranted.