Abstract
Self-harm is an important public health issue among youth, including as a major risk factor for suicide (a leading cause of death in this age group). This study used population-based emergency department data to describe clinical and demographic characteristics of emergency department presentations for self-harm among youth (12-17 year-olds) in the province of Ontario, Canada. Administrative data capturing every emergency department visit in Ontario between April 1, 2002 and March 31, 2009 were used to identify and describe self-harm presentations. Over the 7-year period between 2002/03 and 2008/09, there were 16,835 self-harm presentations by 12,907 youth. Two thirds of self-harm presentations were self-poisonings (almost always with medicinal agents), followed by self-cutting, which accounted for about one quarter. Incidence rates were higher in girls than boys, increased with age, were inversely related to neighbourhood income and were highest in rural areas. Self-harm accounted for about 1 in 100 emergency department presentations by youth, but also a disproportionate number of presentations triaged as high acuity or admitted to hospital (about 1 in 20). Self-harm is an important public health issue, requiring a comprehensive approach to prevention. Ontario has useful data with which to study emergency department presentations for self-harm, and the similarities between self-harm presentations among Ontario youth and those reported from the United States and Europe suggest generalizability of results between populations. Further research is needed to address the reasons for the geographic differences in frequency of self-harm.
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