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    School- and class-level variation in self-harm, suicide ideation and suicide attempts in Danish high schools.

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    Date
    2018-09
    Author
    Hawton, Keith
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    Citation
    Pisinger VSC, Hawton K, Tolstrup JS, School- and class-level variation in self-harm, suicide ideation and suicide attempts in Danish high schools. Scandinavian Journal of Public Health, 17 Sep 2018, 47(2):146-156
    Abstract
    AIM: Strong associations have been found between being exposed to self-harm in family and friends and own self-harm in adolescence. Therefore, self-harm and suicide behaviour might tend to cluster within school and school classes. The aim of this study was to describe the prevalence, frequency and type of self-harm, suicide ideation and suicide attempts within Danish high schools and to test whether self-harm and suicide behaviour cluster in schools and school classes. METHODS:Data came from the Danish National Youth Study 2014, a national survey. The respective study included 66,284 high-school students nested in 117 schools and 3146 school classes. The prevalence and clustering of self-harm behaviour, ever and within the last year, type of self-harm (e.g. cutting, burning, scratching and hitting) and suicide ideation and suicide attempts were investigated. Multi-level logistic regression was applied to quantify clustering among participants within the same class and school. RESULTS:In total, 12,960 (20%) reported self-harm ever and 5706 (8.6%) within the last year. Prevalence was higher among girls than boys. Among girls, cutting (15%) and scratching (13%) was the most common type of self-harm, whereas among boys, hitting (6.7%) was most prevalent. The degree of clustering of self-harm and suicide behaviour was low, with school-level intra-class correlation coefficients (ICC) ranging from 0.8-1.8% and school class level ICC's from 4.3-6.8%. CONCLUSIONS:This study shows that self-harm was common, especially in girls. The degree of clustering of self-harm and suicide behaviour in school and school classes was low.
    URI
    https://oxfordhealth-nhs.archive.knowledgearc.net/handle/123456789/705
    Published online at:
    https://doi.org/10.1177/1403494818799873
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    • Self Harm and Suicide [44]

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