In honor of national suicide prevention week, I thought that I ought to share the results of some data I recently discovered.
Lucassen, M. F. G., Merry, S. N., Robinson, E. M., Denny, S., Clark, T., Ameratunga, S., & Crengle, S. (2011). Sexual attraction, depression, self-harm, suicidality and help-seeking behaviour in New Zealand secondary school students. Australian and New Zealand Journal of Psychiatry, 45(5), 376-383.
Their analysis was based a large-scale sampling secondary students in New Zealand. The study required everyone taking it to identify themselves as either male or female (thus preventing analysis for transgender youth), and in the sexual orientation question, people were asked if they were sexually attracted to the opposite sex, the same sex, both, neither, or unsure. Around 2% said neither. (2.4% of those 15 or younger, and 0.7 of those 16 or older, although the population of asexuals is small enough that this still allows for considerable room for random error, especially as the 16 or older group was much smaller overall.)
Anyway, here are some numbers for asexuality and ethnicity (absolute number in the sample followed by percent of total in parentheses.)
NZ European 69 (1.3)
Maori 10 (1.3)
Pacific 531 (3.6)
Asian 768 (4.3)
Other 346 (2.1)
Neither-attracted had comparable levels of depressive symptoms as opposite-sex attracted people, which was considerably less than that of same-sex-attracted, both-sex-attracted, and unsure groups. The neither-attracted group had a rate comparable to (and sometimes lower than) the opposite-sex-attracted people for reported deliberate self-harming behavior, and having seriously thought about attempting suicide, and suicide attempts. Rates for same-sex-attracted, and both-sex-attracted youth was considerably higher. (The "unsure" group sometimes patterned with the heterosexual group and sometimes with the same-sex-attracted and opposite-sex-attracted groups.)
While it is problematic to try to generalize this data to other populations in other countries (although the trends they report on for heterosexual, homosexual, and bisexual groups is similar to what has been found in the US), the data that we do have suggests that asexuals are not at elevated risk for suicide.