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The Capital Region of Denmark - a part of Copenhagen University Hospital
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The Sex Ratio of Full and Half Siblings of People Diagnosed With ADHD in Childhood and Adolescence: A Danish Nationwide Register-Based Cohort Study

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  1. Attachment Competences in Children With ADHD During the Social-Skills Training and Attachment (SOSTRA) Randomized Clinical Trial

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  2. The Impact of Inattention and Emotional Problems on Cognitive Control in Primary School Children

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  3. Is Behavioral Regulation in Children With ADHD Aggravated by Comorbid Anxiety Disorder?

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  4. Do attention deficits influence IQ assessment in children and adolescents with ADHD?

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  1. Diseases of the circulatory system among adult people diagnosed with infantile autism as children: A longitudinal case control study

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  2. Injury Patterns among Individuals Diagnosed with Infantile Autism during Childhood: A Case-Control Study

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  3. Epilepsy in Individuals with a History of Asperger's Syndrome: A Danish Nationwide Register-Based Cohort Study

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  4. Mortality and Factors Associated with Death in Autism Spectrum Disorders: - a Review

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Objective:It has been suggested that high levels of prenatal testosterone exposure are implied in the etiology of male preponderance disorders such as autism spectrum disorder and ADHD. Within this scope, we studied the sex ratio (proportion of males) in siblings of individuals diagnosed with ADHD in childhood and adolescence. Method: We did a nationwide, register-based cohort study of the sex ratio in siblings of the 16,381 patients in Denmark diagnosed with ADHD at age 17 years and younger and registered in the nationwide Danish Psychiatric Central Register between January 1, 1994 and May 28, 2013. Results: Among the 33,151 siblings, 17,041 were males and 16,110 females. This yields a sex ratio of 0.514, which is not statistically significant different from the Danish live birth sex ratio of 0.513 during the relevant years (p = .70). Conclusion: These findings provide no support for the hypothesis that the sex ratio is elevated among the siblings of people with ADHD.

Original languageEnglish
JournalJournal of Attention Disorders
ISSN1087-0547
DOIs
Publication statusPublished - 21 Apr 2014

ID: 45602205