Oct. 21, 2008 -- It's a troubling trend that researchers say we know little about.
Researchers found that white women made up the largest increase in suicides, although white men still make up the largest number of people who kill themselves.
Suicide rates were down among African-Americans and remained stable for Asian and Native Americans among that same time period.
The study and report by Guoqing Hu, PhD, from Central South University in Changsha, China, and colleagues included co-author Susan Baker, MPH, from the Johns Hopkins Bloomberg School of Public Health.
Why the increase? In a news release, Baker says researchers are not sure: "While it would be straightforward to attribute the results to a rise in so-called mid-life crises, recent studies find that middle age is mostly a time of relative security and emotional well-being."
She urges further research to "explore societal changes that may be disproportionately affecting the middle-aged in this country."
Researchers crunched numbers from data based on files from the National Center for Health Statistics on suicide trends from 1999 to 2005.
Here are the main results:
- The suicide rate for white women 40-64 years old went up 3.9% per year during the study period.
- The suicide rate among white men in the same age group increased 2.7% per year.
- Overall suicide rates went up for whites -- 1.1% per year. Suicide rates went down significantly for African-Americans -- 1.1% per year.
- Suicide rates remained stable for Asian and Native Americans.
The authors write that suicide is the fourth-leading cause of death among people aged 10 to 64.
In a news release, Baker says the results signal a change that could lead to better prevention. "Historically, suicide prevention programs have focused on groups considered to be at highest risk, teens and young adults of both genders as well as elderly white men. This research tells us we need to refocus our resources to develop prevention programs for men and women in their middle years."
In background information presented with the findings, researchers map out suicide risk factors such as:
- A previous suicide attempt
- Mental or physical illness or a family history of mental illness
- A history of sexual assault or abuse
- Family history of suicide
- A sense of hopelessness
- Having a gun in the home or access to other methods to suicide
- Seeing images of suicide in the media
The authors also offer some of the ways to protect against suicide:
- Learning or developing new coping or problem-solving skills
- Adhering to cultural or religious beliefs that discourage suicide
- Strong support from family and/or community members
- Available high-quality treatment for mental or physical disorders or addictions
The results are published online in the American Journal of Preventive Medicine and will appear in the journal's December 2008 print version.