Suicide is defined by the World Health Organization as the act of deliberately killing oneself or intentional self-harm ending in death. Suicide completion, in which a death occurs, can be distinguished from other types of suicidal behavior, which include attempts, suicidal ideation, and other forms of self-harm such as substance abuse. The risk of suicide completion varies over the life course but in different ways according to gender. Worldwide, suicide rates are extremely low during childhood; children younger than 5 may not comprehend the finality of death, and although suicide for children aged 5–14 occurs, it is very rare. In the United States, rates for both men and women start to rise precipitously after age 14, during adolescence and young adulthood. For men, rates historically ...

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