ADHD Combined Type and ADHD Predominantly Inattentive Type Are Distinct and Unrelated Disorders

Authors

Richard Milich, University of KentuckyFollow
Amy C. Balentine, University of Kentucky
Donald R. Lynam, Purdue UniversityFollow

Abstract

We comprehensively reviewed research assessing differences in attention-deficit hyperactivity disorder (ADHD) subtypes to examine the possibility that ADHD/ combined type (ADHD/Q and ADHD/predominantly inattentive type (ADHD/I) are distinct and unrelated disorders. Differences among subtypes were examined along dimensions identified as being important in documenting the distinctiveness of two disorders. These include essential and associated features, demographics, measures of cognitive and neuropsychological functioning, family history, treatment response, and prognosis. Important differences among subtypes were found in several areas of study, supporting the conclusion that ADHD/C and ADHD/I may best be characterized as distinct disorders. We identify major limitations of the available research and present future directions for research.

Document Type

Article

Publication Date

2001

Notes/Citation Information

This article was made available online May 11, 2006.

Digital Object Identifier (DOI)

10.1093/clipsy.8.4.463

Repository Citation

Milich, Richard; Balentine, Amy C.; and Lynam, Donald R., "ADHD Combined Type and ADHD Predominantly Inattentive Type Are Distinct and Unrelated Disorders" (2001). Psychology Faculty Publications. 65.
https://uknowledge.uky.edu/psychology_facpub/65