For many families who lose someone to suicide, the same question comes up again and again: "How did we not see this coming?"

A new study suggests that for some people, there truly weren't clear warning signs to see.

Researchers at the University of Utah found that people who die by suicide without showing prior warning signs, such as suicidal thoughts or past attempts, may have different underlying risk factors than those who express suicidal behavior.

The findings were published recently in JAMA Network Open.

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