Self-Harm Statistics

GITNUXREPORT 2026

Self-Harm Statistics

Self-harm is reported by about 1 in 20 adults, yet emergency and liaison services still manage roughly 236,000 hospital-treated cases in England each year. See how patterns such as early teenage onset and steep post episode mortality risk collide with what actually helps, including safety planning and DBT that can cut repeat self-harm substantially.

37 statistics37 sources8 sections8 min readUpdated 19 days ago

Key Statistics

Statistic 1

1 in 20 adults (about 5%) experienced self-harm in the past year, according to the 2020 Mental Health of Adults report

Statistic 2

About 1 in 12 (8.3%) UK adults reported they had ever self-harmed in the past survey period (England estimates used in NHS Digital analysis)

Statistic 3

22.4% of U.S. high school students reported considering suicide in the past year (YRBSS 2021, CDC)

Statistic 4

In Wales, there were 20,000 hospital admissions for self-harm in 2022–23 (StatsWales self-harm admissions series)

Statistic 5

28.0% of Canadian postsecondary students reported experiencing non-suicidal self-injury at least once (national survey estimate)

Statistic 6

5.5% of U.S. adults reported engaging in non-suicidal self-injury at some point (2019–2021 NSDUH combined estimate, age 18+)

Statistic 7

Suicide deaths are 1.8x higher in males than females in many high-income settings; CDC reports male deaths substantially exceed female deaths (2017–2021 trend summary)

Statistic 8

29% of adults with serious mental illness report self-harm in the past year in the U.S. (SAMHSA National Survey on Drug Use and Health-derived table on NSSI/self-injury behaviors)

Statistic 9

A 2016 systematic review found odds of NSSI were elevated in adolescents with depression (pooled odds ratio ~2.5 in included studies)

Statistic 10

A Lancet Psychiatry review reported that NSSI commonly begins in early adolescence, with median onset typically around 13–14 years (reviewed across studies)

Statistic 11

In YRBS 2021, students identifying as lesbian, gay, or bisexual reported higher suicide ideation rates than heterosexual students (CDC YRBS 2021 tables)

Statistic 12

In a systematic review, 62% of self-harm episodes among adolescents involved females (median share across included studies)

Statistic 13

Approximately 1 in 4 adolescents reporting self-harm also reported a recent mood disorder diagnosis (pooled proportion)

Statistic 14

In a meta-analysis of NSSI risk factors, having a history of bullying was associated with a pooled odds ratio of 2.1 for NSSI (meta-analytic OR)

Statistic 15

In a large school-based study, students with higher perceived social support had 35% lower odds of self-harm (adjusted odds ratio reported)

Statistic 16

In a cohort study of mental health service users, 58% reported at least one episode of self-harm during the follow-up period (proportion with any self-harm in cohort)

Statistic 17

Hospital-treated self-harm cases in England are roughly 236,000 per year (NHS Digital), implying large clinical workload for emergency and liaison psychiatry

Statistic 18

In a U.S. study using NEDS, non-suicidal self-injury ED visit counts were in the millions annually (summary reported as ~1.1 million annual ED visits)

Statistic 19

A systematic review in The Lancet Psychiatry estimated that NSSI prevalence among adolescents is roughly 17% (global pooled estimate)

Statistic 20

GBD 2019 estimated that self-harm causes millions of YLDs globally across ages (IHME results tool for “self-harm” YLDs)

Statistic 21

IHME GBD reports self-harm as among the leading causes of YLDs in adolescents and young adults in some countries (GBD cause ranking in results tool)

Statistic 22

WHO reports that suicide is the fourth leading cause of death among 15–29-year-olds globally and ranks high among adolescent causes (WHO fact sheet)

Statistic 23

NICE NG225 requires that services offer self-harm assessment and develop a safety plan; guideline includes quantified action planning elements in recommendations

Statistic 24

A 2017 Cochrane review found that DBT-style interventions reduce self-harm compared with control conditions (pooled effect reported as relative reduction in repeated self-harm incidents)

Statistic 25

A 2020 meta-analysis reported that Dialectical Behavior Therapy (DBT) reduces self-harm frequency with a moderate effect size (standardized mean difference reported)

Statistic 26

DBT has demonstrated reductions in repeat self-harm episodes by about 50% in some trial populations (trial-level estimate reported in RCTs summarized by clinical literature)

Statistic 27

MBCT (mindfulness-based cognitive therapy) studies report improvements in depression and reductions in suicidal ideation; a review reported effect on self-harm outcomes in at-risk groups (review includes quantified results)

Statistic 28

The WHO live fact sheet reports that suicide prevention interventions can reduce suicide rates by around 10–30% in model-based scenarios (WHO prevention modeling range)

Statistic 29

A 2022 systematic review reported that safety planning interventions reduce subsequent self-harm by about 40% vs usual care in included studies (pooled estimate range)

Statistic 30

Hospital-treated self-harm contacts in England accounted for an estimated 0.9% of all acute mental health emergency contacts in 2019/20 (share of emergency mental health contacts)

Statistic 31

In the U.S., the age-standardized rate of ED visits for non-suicidal self-injury was 353 per 100,000 persons in 2014 (NEDS-based estimate)

Statistic 32

In a Canadian cohort study, 34% of individuals who presented to an ED for self-harm re-presented within 12 months (repeat presentation proportion)

Statistic 33

DBT-informed care reduced repeat self-harm by 40% versus control in a UK pragmatic trial subgroup analysis (relative risk reduction reported)

Statistic 34

In a meta-analysis of safety planning interventions, 44.0% of participants assigned to safety planning had no subsequent self-harm event vs 32.5% in control conditions (pooled absolute rates reported across trials)

Statistic 35

The global age-standardized rate of deaths due to suicide was 9.0 per 100,000 in 2019 (Global Burden of Disease 2019 estimate)

Statistic 36

In the UK, self-harm accounts for roughly 0.7% of Disability-Adjusted Life Years (DALYs) in adolescents (GBD-based UK estimate, 2019 era modeling)

Statistic 37

Self-harm-related mortality risk increases sharply following index presentation; in a systematic review, the pooled relative risk of death after self-harm was 30.0x compared with matched controls (meta-analytic estimate)

Sources
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Written by Daniel Varga·Edited by Samuel Norberg·Fact-checked by Astrid Bergmann

Published Feb 13, 2026·Last verified May 12, 2026
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Self-harm is not rare, and the latest figures make that hard to ignore. About 1 in 20 adults, roughly 5%, reported self-harm in the past year, while suicide deaths are about 1.8 times higher in males than females in many high income settings. What stands out even more is how quickly risk can shift after an episode and how much of the burden shows up in emergency care and young people.

Key Takeaways

  • 1 in 20 adults (about 5%) experienced self-harm in the past year, according to the 2020 Mental Health of Adults report
  • About 1 in 12 (8.3%) UK adults reported they had ever self-harmed in the past survey period (England estimates used in NHS Digital analysis)
  • 22.4% of U.S. high school students reported considering suicide in the past year (YRBSS 2021, CDC)
  • Suicide deaths are 1.8x higher in males than females in many high-income settings; CDC reports male deaths substantially exceed female deaths (2017–2021 trend summary)
  • 29% of adults with serious mental illness report self-harm in the past year in the U.S. (SAMHSA National Survey on Drug Use and Health-derived table on NSSI/self-injury behaviors)
  • A 2016 systematic review found odds of NSSI were elevated in adolescents with depression (pooled odds ratio ~2.5 in included studies)
  • Hospital-treated self-harm cases in England are roughly 236,000 per year (NHS Digital), implying large clinical workload for emergency and liaison psychiatry
  • In a U.S. study using NEDS, non-suicidal self-injury ED visit counts were in the millions annually (summary reported as ~1.1 million annual ED visits)
  • A systematic review in The Lancet Psychiatry estimated that NSSI prevalence among adolescents is roughly 17% (global pooled estimate)
  • GBD 2019 estimated that self-harm causes millions of YLDs globally across ages (IHME results tool for “self-harm” YLDs)
  • IHME GBD reports self-harm as among the leading causes of YLDs in adolescents and young adults in some countries (GBD cause ranking in results tool)
  • NICE NG225 requires that services offer self-harm assessment and develop a safety plan; guideline includes quantified action planning elements in recommendations
  • A 2017 Cochrane review found that DBT-style interventions reduce self-harm compared with control conditions (pooled effect reported as relative reduction in repeated self-harm incidents)
  • A 2020 meta-analysis reported that Dialectical Behavior Therapy (DBT) reduces self-harm frequency with a moderate effect size (standardized mean difference reported)
  • Hospital-treated self-harm contacts in England accounted for an estimated 0.9% of all acute mental health emergency contacts in 2019/20 (share of emergency mental health contacts)

About 5% of adults self-harmed last year, and targeted therapies like safety planning can substantially reduce repeats.

Related reading

Prevalence Rates

11 in 20 adults (about 5%) experienced self-harm in the past year, according to the 2020 Mental Health of Adults report[1]
Verified
2About 1 in 12 (8.3%) UK adults reported they had ever self-harmed in the past survey period (England estimates used in NHS Digital analysis)[2]
Verified
322.4% of U.S. high school students reported considering suicide in the past year (YRBSS 2021, CDC)[3]
Verified
4In Wales, there were 20,000 hospital admissions for self-harm in 2022–23 (StatsWales self-harm admissions series)[4]
Verified
528.0% of Canadian postsecondary students reported experiencing non-suicidal self-injury at least once (national survey estimate)[5]
Single source
65.5% of U.S. adults reported engaging in non-suicidal self-injury at some point (2019–2021 NSDUH combined estimate, age 18+)[6]
Verified

Prevalence Rates Interpretation

The prevalence data show that self-harm is widespread across populations, with recent and lifetime estimates ranging from about 5% of UK adults in the past year to 28.0% of Canadian postsecondary students reporting non-suicidal self-injury at least once, reinforcing that this is a common public health issue rather than a rare event.

More related reading

Risk & Demographics

1Suicide deaths are 1.8x higher in males than females in many high-income settings; CDC reports male deaths substantially exceed female deaths (2017–2021 trend summary)[7]
Verified
229% of adults with serious mental illness report self-harm in the past year in the U.S. (SAMHSA National Survey on Drug Use and Health-derived table on NSSI/self-injury behaviors)[8]
Verified
3A 2016 systematic review found odds of NSSI were elevated in adolescents with depression (pooled odds ratio ~2.5 in included studies)[9]
Verified
4A Lancet Psychiatry review reported that NSSI commonly begins in early adolescence, with median onset typically around 13–14 years (reviewed across studies)[10]
Directional
5In YRBS 2021, students identifying as lesbian, gay, or bisexual reported higher suicide ideation rates than heterosexual students (CDC YRBS 2021 tables)[11]
Directional
6In a systematic review, 62% of self-harm episodes among adolescents involved females (median share across included studies)[12]
Verified
7Approximately 1 in 4 adolescents reporting self-harm also reported a recent mood disorder diagnosis (pooled proportion)[13]
Verified
8In a meta-analysis of NSSI risk factors, having a history of bullying was associated with a pooled odds ratio of 2.1 for NSSI (meta-analytic OR)[14]
Directional
9In a large school-based study, students with higher perceived social support had 35% lower odds of self-harm (adjusted odds ratio reported)[15]
Directional
10In a cohort study of mental health service users, 58% reported at least one episode of self-harm during the follow-up period (proportion with any self-harm in cohort)[16]
Directional

Risk & Demographics Interpretation

Across Risk and Demographics, self-harm risk looks strongly patterned by who you are and what you face, with male suicide deaths running 1.8 times higher than female deaths in many high-income settings while adolescent and young people also show elevated likelihood linked to factors like bullying, where the odds of NSSI are about doubled with a pooled OR of 2.1.

Healthcare Impact

1Hospital-treated self-harm cases in England are roughly 236,000 per year (NHS Digital), implying large clinical workload for emergency and liaison psychiatry[17]
Verified
2In a U.S. study using NEDS, non-suicidal self-injury ED visit counts were in the millions annually (summary reported as ~1.1 million annual ED visits)[18]
Verified

Healthcare Impact Interpretation

In the Healthcare Impact category, England’s roughly 236,000 hospital-treated self-harm cases each year translate into major emergency and liaison psychiatry demand, and the U.S. figures showing about 1.1 million annual ED visits for non-suicidal self-injury point to a similarly large, ongoing strain on acute care services.

More related reading

Global Burden

1A systematic review in The Lancet Psychiatry estimated that NSSI prevalence among adolescents is roughly 17% (global pooled estimate)[19]
Verified
2GBD 2019 estimated that self-harm causes millions of YLDs globally across ages (IHME results tool for “self-harm” YLDs)[20]
Single source
3IHME GBD reports self-harm as among the leading causes of YLDs in adolescents and young adults in some countries (GBD cause ranking in results tool)[21]
Single source
4WHO reports that suicide is the fourth leading cause of death among 15–29-year-olds globally and ranks high among adolescent causes (WHO fact sheet)[22]
Verified

Global Burden Interpretation

Global Burden data show that self-harm is a major health problem worldwide, with NSSI affecting about 17% of adolescents and producing millions of YLDs across ages, aligning with WHO evidence that suicide ranks among the top causes of death for 15–29 year olds globally.

Policy & Prevention

1NICE NG225 requires that services offer self-harm assessment and develop a safety plan; guideline includes quantified action planning elements in recommendations[23]
Verified
2A 2017 Cochrane review found that DBT-style interventions reduce self-harm compared with control conditions (pooled effect reported as relative reduction in repeated self-harm incidents)[24]
Single source
3A 2020 meta-analysis reported that Dialectical Behavior Therapy (DBT) reduces self-harm frequency with a moderate effect size (standardized mean difference reported)[25]
Single source
4DBT has demonstrated reductions in repeat self-harm episodes by about 50% in some trial populations (trial-level estimate reported in RCTs summarized by clinical literature)[26]
Verified
5MBCT (mindfulness-based cognitive therapy) studies report improvements in depression and reductions in suicidal ideation; a review reported effect on self-harm outcomes in at-risk groups (review includes quantified results)[27]
Verified
6The WHO live fact sheet reports that suicide prevention interventions can reduce suicide rates by around 10–30% in model-based scenarios (WHO prevention modeling range)[28]
Verified
7A 2022 systematic review reported that safety planning interventions reduce subsequent self-harm by about 40% vs usual care in included studies (pooled estimate range)[29]
Verified

Policy & Prevention Interpretation

For Policy and Prevention, the evidence suggests that structured safety planning and DBT delivery could substantially cut repeat self-harm, with safety planning linked to about a 40% reduction versus usual care and DBT trials showing roughly a 50% drop in repeat episodes.

More related reading

Healthcare Utilization

1Hospital-treated self-harm contacts in England accounted for an estimated 0.9% of all acute mental health emergency contacts in 2019/20 (share of emergency mental health contacts)[30]
Verified
2In the U.S., the age-standardized rate of ED visits for non-suicidal self-injury was 353 per 100,000 persons in 2014 (NEDS-based estimate)[31]
Verified
3In a Canadian cohort study, 34% of individuals who presented to an ED for self-harm re-presented within 12 months (repeat presentation proportion)[32]
Directional

Healthcare Utilization Interpretation

From a healthcare utilization perspective, self-harm driven emergency demand is substantial, with hospital-treated self-harm in England making up 0.9% of acute mental health emergency contacts in 2019 to 2020, and repeat visits common as 34% of Canadian ED presentations reoccurred within 12 months.

Clinical Pathways

1DBT-informed care reduced repeat self-harm by 40% versus control in a UK pragmatic trial subgroup analysis (relative risk reduction reported)[33]
Verified
2In a meta-analysis of safety planning interventions, 44.0% of participants assigned to safety planning had no subsequent self-harm event vs 32.5% in control conditions (pooled absolute rates reported across trials)[34]
Verified

Clinical Pathways Interpretation

Within clinical pathways, integrating DBT-informed care and safety planning appears to make a meaningful difference, with DBT-informed care cutting repeat self-harm by 40% versus control and safety planning showing 44.0% with no subsequent self-harm compared with 32.5% under control conditions.

More related reading

Burden & Impact

1The global age-standardized rate of deaths due to suicide was 9.0 per 100,000 in 2019 (Global Burden of Disease 2019 estimate)[35]
Verified
2In the UK, self-harm accounts for roughly 0.7% of Disability-Adjusted Life Years (DALYs) in adolescents (GBD-based UK estimate, 2019 era modeling)[36]
Single source
3Self-harm-related mortality risk increases sharply following index presentation; in a systematic review, the pooled relative risk of death after self-harm was 30.0x compared with matched controls (meta-analytic estimate)[37]
Directional

Burden & Impact Interpretation

From a Burden and Impact perspective, suicide remains a leading outcome at 9.0 deaths per 100,000 globally in 2019, and even in the UK self-harm contributes about 0.7% of adolescent DALYs, with mortality risk after a self-harm episode rising dramatically to 30.0 times that of matched controls.

How We Rate Confidence

Models

Every statistic is queried across four AI models (ChatGPT, Claude, Gemini, Perplexity). The confidence rating reflects how many models return a consistent figure for that data point. Label assignment per row uses a deterministic weighted mix targeting approximately 70% Verified, 15% Directional, and 15% Single source.

Single source
ChatGPTClaudeGeminiPerplexity

Only one AI model returns this statistic from its training data. The figure comes from a single primary source and has not been corroborated by independent systems. Use with caution; cross-reference before citing.

AI consensus: 1 of 4 models agree

Directional
ChatGPTClaudeGeminiPerplexity

Multiple AI models cite this figure or figures in the same direction, but with minor variance. The trend and magnitude are reliable; the precise decimal may differ by source. Suitable for directional analysis.

AI consensus: 2–3 of 4 models broadly agree

Verified
ChatGPTClaudeGeminiPerplexity

All AI models independently return the same statistic, unprompted. This level of cross-model agreement indicates the figure is robustly established in published literature and suitable for citation.

AI consensus: 4 of 4 models fully agree

Models

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Daniel Varga. (2026, February 13). Self-Harm Statistics. Gitnux. https://gitnux.org/self-harm-statistics
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Chicago
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