Sex and Age Differences in Attention-Deficit/Hyperactivity Disorder Symptoms and Diagnoses: Implications for DSM-V and ICD-11

 This article is discussed in an editorial by Dr. Russell A. Barkley on page 205.

 Supplemental material cited in this article is available online.

 This article was reviewed under and accepted by Ad Hoc Editor F. Xavier Castellanos, M.D.

 This work was supported by award numbers R01-MH-067921 (PI-RDT), R01-MH-083823 (PI-AAT), and K08-MH-080287 (PI-AMR) from the National Institute of Mental Health (NIMH). The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIMH or the National Institutes of Health.

 An earlier version of this manuscript fulfilled the thesis requirement for Dr. Ramtekkar's Master of Psychiatric Epidemiology degree.

 This paper is dedicated to the senior author, Dr. Richard Todd, who died from complications of leukemia on August 22, 2008. Dr. Todd was principal investigator on the study described here. He was heavily involved in supervising the data analysis and writing of this paper, even until a few days before his death. Dr. Todd was a brilliant scientist, an excellent mentor, and a highly valued colleague.

 Disclosure: Drs. Ramtekkar, Reiersen, Todorov, and Todd report no biomedical financial interests or potential conflicts of interest.

PII: S0890-8567(09)00052-5

doi:10.1016/j.jaac.2009.11.011

© 2010 American Academy of Child and Adolescent Psychiatry. Published by Elsevier Inc. All rights reserved.