WASHINGTON — Suicide in the United States has surged to the highest levels in nearly 30 years, a federal data analysis has found, with increases in every age group except older adults.
The rise was particularly steep for women. It was also substantial among middle-aged Americans, sending a signal of deep anguish from a group whose suicide rates had been stable or falling since the 1950s.
The suicide rate for middle-aged women, ages 45 to 64, jumped by 63 percent over the period of the study, while it rose by 43 percent for men in that age range, the sharpest increase for males of any age. The overall suicide rate rose by 24 percent from 1999 to 2014, according to the National Center for Health Statistics, which released the study Friday.
The increases were so widespread that they lifted the nation's suicide rate to 13 per 100,000 people, the highest since 1986. The rate rose by 2 percent a year starting in 2006, double the annual rise in the earlier period of the study. In all, 42,773 people died from suicide in 2014, compared with 29,199 in 1999.
"It's really stunning to see such a large increase in suicide rates affecting virtually every age group," said Katherine Hempstead, senior adviser for health care at the Robert Wood Johnson Foundation, who has identified a link between suicides in middle age and rising rates of distress about jobs and personal finances.
Researchers also found an alarming increase among girls 10 to 14, whose suicide rate, while still very low, had tripled. The number of girls who killed themselves rose to 150 in 2014 from 50 in 1999. "This one certainly jumped out," said Sally Curtin, a statistician at the center and an author of the report.
American Indians had the sharpest rise of all racial and ethnic groups, with rates rising by 89 percent for women and 38 percent for men. White middle-aged women had an increase of 80 percent.
The rate declined for just one racial group: black men. And it declined for only one age group: men and women over 75.
The question of what has driven the increases is unresolved, leaving experts to muse on the reasons.
Julie Phillips, a professor of sociology at Rutgers who has studied suicide among middle-aged Americans, said social changes could be raising the risks. Marriage rates have declined, particularly among less educated Americans, while divorce rates have risen, leading to increased social isolation, she said. She calculated that in 2005, unmarried middle-aged men were 3.5 times more likely than married men to die from suicide, and their female counterparts were as much as 2.8 times more likely to kill themselves. The divorce rate has doubled for middle-aged and older adults since the 1990s, she said.
Disappointed expectations of social and economic well-being among less educated white men from the baby-boom generation may be playing a role, she said.