Mortality/Morbidity
The morbidity of the depression is difficult to quantify. The lethality of depression, however, is measurable and is the result of completed suicide, which is the eighth leading reported cause of death in the United States.
In 2005, 1.4% of all deaths worldwide were attributed to suicide. The real number is unknown since underreporting is predictably significant. Suicide is estimated to be the eighth leading cause of death in all age ranges.
Almost all people who kill themselves intentionally have a diagnosable mental disorder with or without substance abuse, which in itself, is often a result of attempted self-treatment for the symptoms of depression. Approximately two thirds of individuals who complete suicide have seen a physician within a month of their death.