Prevalence of Nonsuicidal Self-Injury in Nonclinical Samples: Systematic Review, Meta-Analysis and Meta-Regression

Published prevalence estimates of nonsuicidal self‐injury (NSSI) among nonclinical samples are highly heterogeneous, raising concerns about their reliability and hindering attempts to explore the alleged increase in NSSI over time. Accordingly, the objectives of this study were to investigate the in...

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Bibliographic Details
Published in:Suicide & life-threatening behavior 2014-06, Vol.44 (3), p.273-303
Main Authors: Swannell, Sarah V., Martin, Graham E., Page, Andrew, Hasking, Penelope, St John, Nathan J.
Format: Article
Language:English
Subjects:
Adolescent
Adult
Adult and adolescent clinical studies
Biological and medical sciences
Female
Global Health
Humans
Male
Medical sciences
Meta-analysis
Prevalence
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
Regression analysis
Reliability
Self destructive behavior
Self-Injurious Behavior - epidemiology
Suicide
Suicides & suicide attempts
Systematic review
United States - epidemiology
Young Adult
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Summary:Published prevalence estimates of nonsuicidal self‐injury (NSSI) among nonclinical samples are highly heterogeneous, raising concerns about their reliability and hindering attempts to explore the alleged increase in NSSI over time. Accordingly, the objectives of this study were to investigate the influence of methodological factors on heterogeneity in NSSI prevalence estimates, explore changes over time, and estimate overall international NSSI prevalence. Results showed that methodological factors contributed over half (51.6%) of the heterogeneity in prevalence estimates, and, after adjusting for these factors, NSSI prevalence did not increase over time. Overall, pooled NSSI prevalence was 17.2% among adolescents, 13.4% among young adults, and 5.5% among adults. Clearly, development of standardized methodology in NSSI research is crucial if accurate estimates are desired.
ISSN:0363-0234
1943-278X
DOI:10.1111/sltb.12070