Younger Veterans at Greater Suicide Risk

TUESDAY, Oct. 30 (HealthDay News) -- A study of U.S. veterans suffering from depression finds that their risk factors for suicide differ in surprising ways from those of other depressed Americans.

Specifically, the risk for suicide appears highest among younger veterans -- the reverse of what's seen in the general population.

And even though post-traumatic stress disorder (PTSD) can be deeply mentally distressing, veterans suffering with the disorder were actuallylessprone to suicide than those not afflicted by the condition.

The reasons for that remain unclear, the study authors said.

"It's possible that people with PTSD may be receiving additional services, they may have a greater connection to the VA health system -- more psychotherapy visits, for example," said lead researcher Kara Zivin, a Veterans Administration investigator and assistant professor of psychiatry at the University of Michigan at Ann Arbor.

Her team published its findings Tuesday in the online edition of theAmerican Journal of Public Health.

Military service comes with special challenges, and the 1999 Veterans Health Study found that nearly a third -- 31 percent -- of veterans were suffering depressive symptoms, a rate that's two to five times higher than observed in the general public.

Now, as a new generation of soldiers returns from Iraq and Afghanistan, Zivin's team sought to better understand the risks depressed veterans face for suicide. To do so, they pored through data from the VA's National Registry for Depression for the years 1999 to 2004.

Overall, the researchers looked at information on almost 808,000 veterans diagnosed with depressive symptoms; 1,683 (0.21 percent) of those veterans took their own lives.

The researchers compared the characteristics of the depressed veterans who committed suicide against the characteristics of those who did not.

Dividing veterans into three groups by age -- 18 to 44 years, 45 to 64 years, and 65 or over -- Zivin's team found that the youngest group was at higher risk of suicide. Veterans aged 18 to 44 committed suicide at a rate of about 95 suicides per every 100,00 person years, versus about 78 per 100,000 person years in the group aged 45 to 64, and 90 per 100,000 for those 65 or older.

That findings are at odds with suicide trends among the general population, where younger depressed people are typically at lower risk than older individuals, the researchers said.