Suicide is a tragic and potentially preventable public health problem. In 2000, suicide was the 11th leading cause of death in the U.S. Specifically, 10.6 out of every 100,000 persons died by suicide. The total number of suicides was 29,350, or 1.2 percent of all deaths. Suicide deaths outnumber homicide deaths by five to three. It has been estimated that there may be from 8 to 25 attempted suicides per every suicide death. The alarming numbers of suicide deaths and attempts emphasize the need for carefully designed prevention efforts.
Suicidal behavior is complex. Some risk factors vary with age, gender, and ethnic group and may even change over time. The risk factors for suicide frequently occur in combination. Research has shown that more than 90 percent of people who kill themselves have depression or another diagnosable mental or substance abuse disorder, often in combination with other mental disorders. Also, research indicates that alterations in neurotransmitters such as serotonin are associated with the risk for suicide. Diminished levels of this brain chemical have been found in patients with depression, impulsive disorders, a history of violent suicide attempts, and also in postmortem brains of suicide victims.
Adverse life events in combination with other risk factors such as depression may lead to suicide. However, suicide and suicidal behavior are not normal responses to stress. Many people have one or more risk factors and are not suicidal. Other risk factors include: prior suicide attempt; family history of mental disorder or substance abuse; family history of suicide; family violence, including physical or sexual abuse; firearms in the home; incarceration; and exposure to the suicidal behavior of others, including family members, peers, or even in the media.
Suicide was the eighth leading cause of death for males and the 19th leading cause of death for females in 2000. More than four times as many men as women die by suicide, although women report attempting suicide during their lifetime about three times as often as men. Suicide by firearm is the most common method for both men and women, accounting for 57 percent of all suicides in 2000. White men accounted for 73 percent of all suicides and 80 percent of all firearm suicides.
Children, Adolescents, and Young Adults
In 2000, suicide was the third leading cause of death among 15- to 24-year-olds—10.4 of every 100,000 persons in this age group—following unintentional injuries and homicide. Suicide was also the 3rd leading cause of death among children ages 10 to 14, with a rate of 1.5 per 100,000 children in this age group. The suicide rate for adolescents ages 15 to 19 was 8.2 deaths per 100,000 teenagers, including five times as many males as females. Among people 20 to 24 years of age, the suicide rate was 12.8 per 100,000 young adults, with seven times as many deaths among men as among women.
Older adults are disproportionately likely to die by suicide. Comprising only 13 percent of the U.S. population, individuals age 65 and older accounted for 18 percent of all suicide deaths in 2000. Among the highest rates (when categorized by gender and race) were white men age 85 and older: 59 deaths per 100,000 persons, more than five times the national U.S. rate of 10.6 per 100,000.
Overall, there may be between 8 and 25 attempted suicides for every suicide death; the ratio is higher in women and youth and lower in men and the elderly.2 Risk factors for attempted suicide in adults include depression, alcohol abuse, cocaine use, and separation or divorce. Risk factors for attempted suicide in youth include depression, alcohol or other drug use disorder, physical or sexual abuse, and disruptive behavior. As with people who die by suicide, many people who make serious suicide attempts have co-occurring mental or substance abuse disorders. The majority of suicide attempts are expressions of extreme distress and not just harmless bids for attention. A suicidal person should not be left alone and needs immediate mental health treatment.
Preventive efforts to reduce suicide should be based on research that shows which risk and protective factors can be modified, as well as which groups of people are appropriate for the intervention. In addition, prevention programs must be carefully tested to determine if they are safe, truly effective, and worth the considerable cost and effort needed to implement and sustain them.
Many interventions designed to reduce suicidality also include the treatment of mental and substance abuse disorders. Because older adults, as well as women who die by suicide, are likely to have seen a primary care provider in the year prior to their suicide, improving the recognition and treatment of mental disorders and other suicide risk factors in primary care settings may be one avenue to prevent suicides among these groups.
Recently, the manufacturer of the medication clozapine received the first ever Food and Drug Administration indication for effectiveness in preventing suicide attempts among persons with schizophrenia. Additional promising pharmacologic and psychosocial treatments for suicidal individuals are currently being tested.
If someone is suicidal, he or she must not be left alone. Try to get the person to seek help immediately from his or her doctor or the nearest hospital emergency room, or call 911. It is also important to limit the person's access to firearms, medications, or other lethal methods for suicide.
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