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P172 Attention deficit hyperactivity disorder and risk of injuries
  1. Linda Kærlev1,2,
  2. Mette Udsen1,2,
  3. Niels Bilenberg3,
  4. Hans Christian Kaerlev4
  1. 1Research Unit of Clinical Epidemiology, Institute of Clinical Research, University of Southern Denmark, Odense C, Denmark
  2. 2Center for Clinical Epidemiology, Odense University Hospital, Odense C, Denmark
  3. 3Department of Child and Adolescent Mental Health Odense, Mental Health Services in the Region of Southern Denmark, Odense C, Denmark
  4. 4Department of Orthopaedic Surgery, Odense University Hospital, Odense C, Denmark

Abstract

Objective To investigate associations between a diagnosis of Attention Deficit Hyperactivity Disorder (ADHD) and their risk of injuries.

Methods In a cohort study of children and adolescence, the ADHD diagnosis was extracted from the Danish Child and Adolescent Psychiatric Departments according to the BupBase, and merged with the Danish National Patient Register, in 2004–2010, (8,601 with a confirmed diagnosis) and compared with 115,700 controls from the background population. They were followed up for injuries in the Danish National Patient Register in 2005–2011. Logistic regression with adjustment for age, gender and ethnicity was used to calculate odds ratios (OR) with 95% confidence intervals (CI).

Results The number of patients and thus the incidence of hospital contacts for ADHD increased during the study period e.g. n = 767 in 2004, and n = 1,347 in 2008. In subgroup analyses the 14 to 18 year olds with ADHD showed an increased risk, adjusted OR, (95% CI), of injuries, 1.4 (1.3–1.5). Due to effect modification by gender we looked at each gender separately, and we found a slightly higher risk of injuries among females.

Conclusion We found an overall increased risk of injuries for both genders of ADHD. Further studies on types of injuries and injury mechanisms are needed as well as subgroup analyses on the impact of the ADHD diagnosis on the risk of occupational injuries.

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