, which is a measure of each country's disease burden, for self-inflicted injuries per 100,000 inhabitants in 2004 It is difficult to gain an accurate picture of incidence and prevalence of self-harm. Even with sufficient monitoring resources, self-harm is usually unreported, with instances taking place in private and wounds being treated by the self-harming individual. Recorded figures can be based on three sources: psychiatric samples, hospital admissions and general population surveys. A 2015 meta-analysis of reported self-harm among 600,000 adolescents found a lifetime prevalence of 11.4% for suicidal or non-suicidal self-harm (i.e. excluding self-poisoning) and 22.9% for non-suicidal self-injury (i.e. excluding suicidal acts), for an overall prevalence of 16.9%. The difference in SH and NSSI rates, compared to figures of 16.1% and 18.0% found in a 2012 review, may be attributable to differences in methodology among the studies analyzed. The
World Health Organization estimates that, as of 2010, 880,000 deaths occur as a result of self-harm (including suicides). About 10% of admissions to medical wards in the UK are as a result of self-harm, the majority of which are
drug overdoses. However, studies based only on hospital admissions may hide the larger group of self-harmers who do not need or seek hospital treatment for their injuries, The onset of self-harm tends to occur around
puberty, although scholarship is divided as to whether this is usually before puberty or later in adolescence. Meta-analyses have not supported some studies' conclusion that self-harm rates are increasing among adolescents. It is generally thought that self-harm rates increase over the course of adolescence, although this has not been studied thoroughly. The earliest reported incidents of self-harm are in children between 5 and 7 years old. In addition there appears to be an increased risk of self-harm in college students than among the general population. At least one in ten Chinese college students experience self-harm; in 2019, intentional self-harm and sequelae were the third and second leading causes of death among adolescents aged 15 to 19 years and 20 to 24 years in the country. In Ireland, a study found that instances of hospital-treated self-harm were much higher in city and urban districts, than in rural settings. The CASE (Child & Adolescent Self-harm in Europe) study suggests that the life-time risk of self-injury is ~1:7 for women and ~1:25 for men.
Gender differences Aggregated research has found no difference in the prevalence of self-harm between men and women. Such problems have sometimes been the focus of criticism in the context of broader psychosocial interpretation. For example, feminist author Barbara Brickman has speculated that reported gender differences in rates of self-harm are due to deliberate socially
biased methodological and sampling errors, directly blaming medical discourse for pathologising the female. Analyzing 70 most-cited articles in the psychiatrists and psychoanalytics journals in 2020, the psychologist Adrien Cascarino found out that one of the reason for this bias was the belief that most of the people self-harm because they have been sexually abused during their childhood (and were therefore mostly women), This gender discrepancy is often distorted in specific populations where rates of self-harm are inordinately high, which may have implications on the significance and interpretation of psychosocial factors other than gender. A study in 2003 found an extremely high prevalence of self-harm among 428
homeless and runaway youths (aged 16–19) with 72% of males and 66% of females reporting a history of self-harm. However, in 2008, a study of young people and self-harm saw the gender gap widen in the opposite direction, with 32% of young females, and 22% of young males admitting to self-harm. Studies also indicate that males who self-harm may also be at
a greater risk of completing suicide. However, females who self-cut are more likely than males to explain their self-harm episode by saying that they had wanted to punish themselves. In
New Zealand, more females are hospitalized for intentional self-harm than males. Females more commonly choose methods such as self-poisoning that generally are not fatal, but still serious enough to require hospitalization.
Elderly In a study of a district general hospital in the UK, 5.4% of all the hospital's self-harm cases were aged over 65. The male to female ratio was 2:3, although the self-harm rates for males and females over 65 in the local population were identical. Over 90% had depressive conditions, and 63% had significant physical illness. Under 10% of the patients gave a prior history of earlier self-harm, while both the repetition and suicide rates were very low, which could be explained by the absence of factors known to be associated with repetition, such as personality disorder and alcohol abuse. Deliberate self-harm is common in the developing world. Research into self-harm in these areas is however, still very limited. Though an important case study is that of
Sri Lanka, which is a country exhibiting a high incidence of suicide and self-poisoning with agricultural
pesticides or natural poisons. Prisoners are sometimes placed in
solitary confinement cells under
protective custody to prevent them from harming themselves. Self-harm also occurs frequently in inmates who are placed in solitary confinement. ==Awareness==