In a 2013 study, Yule et al. looked into mental health variances between Caucasian heterosexuals, homosexuals, bisexuals, and asexuals. The results of 203 male and 603 female participants were included in the findings. Yule et al. found that asexual male participants were more likely to report having a mood disorder than other males, particularly in comparison to the heterosexual participants. The same was found for female asexual participants over their heterosexual counterparts; however, non-asexual, non-heterosexual females had the highest rates. Asexual participants of both sexes were more likely to have anxiety disorders than heterosexual and non-heterosexual participants, as were they more likely than heterosexual participants to report having had recent suicidal feelings. Yule et al. hypothesized that some of these differences may be due to discrimination and other societal factors.