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  • Title: Bullying victimisation and risk of self harm in early adolescence: longitudinal cohort study.
    Author: Fisher HL, Moffitt TE, Houts RM, Belsky DW, Arseneault L, Caspi A.
    Journal: BMJ; 2012 Apr 26; 344():e2683. PubMed ID: 22539176.
    Abstract:
    OBJECTIVES: To test whether frequent bullying victimisation in childhood increases the likelihood of self harming in early adolescence, and to identify which bullied children are at highest risk of self harm. DESIGN: The Environmental Risk (E-Risk) longitudinal study of a nationally representative UK cohort of 1116 twin pairs born in 1994-95 (2232 children). SETTING: England and Wales, United Kingdom. PARTICIPANTS: Children assessed at 5, 7, 10, and 12 years of age. MAIN OUTCOME MEASURES: Relative risks of children's self harming behaviour in the six months before their 12th birthday. RESULTS: Self harm data were available for 2141 children. Among children aged 12 who had self harmed (2.9%; n=62), more than half were victims of frequent bullying (56%; n=35). Exposure to frequent bullying predicted higher rates of self harm even after children's pre-morbid emotional and behavioural problems, low IQ, and family environmental risks were taken into account (bullying victimisation reported by mother: adjusted relative risk 1.92, 95% confidence interval 1.18 to 3.12; bullying victimisation reported by child: 2.44, 1.36 to 4.40). Victimised twins were more likely to self harm than were their non-victimised twin sibling (bullying victimisation reported by mother: 13/162 v 3/162, ratio=4.3, 95% confidence interval 1.3 to 14.0; bullying victimisation reported by child: 12/144 v 7/144, ratio=1.7, 0.71 to 4.1). Compared with bullied children who did not self harm, bullied children who self harmed were distinguished by a family history of attempted/completed suicide, concurrent mental health problems, and a history of physical maltreatment by an adult. CONCLUSIONS: Prevention of non-suicidal self injury in young adolescents should focus on helping bullied children to cope more appropriately with their distress. Programmes should target children who have additional mental health problems, have a family history of attempted/completed suicide, or have been maltreated by an adult.
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