A majority of American men who die by suicide don’t have any known history of mental health problems, according to new research by UCLA professor Mark Kaplan and colleagues.

“What’s striking about our study is the conspicuous absence of standard psychiatric markers of suicidality among a large number of males of all ages who die by suicide,” said Kaplan, a professor of social welfare at the UCLA Luskin School of Public Affairs.

For the study, published online in the American Journal of Preventive Medicine, Kaplan and his co-authors from the Centers for Disease Control and Prevention tracked recent suicide deaths among U.S. males aged 10 and older. 

Keep reading here.