白人自殺比其它種族高。

Suicide is more common among whites in the U.S. than blacks, Asians, or Hispanics.

"No one is quite sure why whites are at a higher risk," says Dr. Valenstein. "It might have to do with differences in social support."

The only group at higher risk is American Indian/Alaskan Natives, who have a suicide rate of 14.3 per 100,000 compared to 13.5 per 100,000 for whites and about 5 to 6 per 100,000 for other groups.