Do Firstborn Children Have an Increased Risk of ADHD?

Objective: Although previous reports have found no birth-order influence on ADHD risk, the authors hypothesize that being the firstborn is a risk factor for developing ADHD. Method: They selected all of the currently treated ADHD outpatients (n = 748) from our database. Families with adopted sons, n...

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Bibliographic Details
Published in:	Journal of attention disorders Vol. 18; no. 7; pp. 594 - 597
Main Authors:	Marín, Adela Masana, Seco, Fernando Lopez, Serrano, Susana Martí, García, Silvia Acosta, Gaviria Gómez, Ana Milena, Ney, Inti
Format:	Journal Article
Language:	English
Published:	Los Angeles, CA SAGE Publications 01-10-2014
Subjects:	Adult Attention Deficit Disorder with Hyperactivity - diagnosis Attention Deficit Disorder with Hyperactivity - epidemiology Birth Order - psychology Case-Control Studies Child Female Humans Male Parents Prevalence Risk Factors Siblings - psychology firstborn children epidemiology Attention deficit disorder, ADHD family risk factors
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Summary:	Objective: Although previous reports have found no birth-order influence on ADHD risk, the authors hypothesize that being the firstborn is a risk factor for developing ADHD. Method: They selected all of the currently treated ADHD outpatients (n = 748) from our database. Families with adopted sons, nonnuclear families, and families with only one child and with sons (affected or unaffected) younger than 6 or older than 18 years were excluded. A total of 181 families with 213 ADHD sons met the inclusion criteria. We used all siblings without a clinical diagnosis of ADHD and who had no contact with our service as our unaffected controls (n = 173). Results: The bivariate analysis showed that ADHD was associated with birth order and that firstborn children had nearly twice the ADHD risk of children with other birth orders. Conclusion: birth order can be an ADHD risk factor in clinical samples.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1087-0547 1557-1246
DOI:	10.1177/1087054712445066