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J Am Acad Child Adolesc Psychiatry. 2008 Jan;47(1):76-85. doi: 10.1097/chi.0b013e31815a6aca.

Predictors of stability of attention-deficit/hyperactivity disorder subtypes from childhood to young adulthood.

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  • 1Department of Psychiatry, Washington University School of Medicine, Campus Box 8134, 660 S. Euclid Avenue, St. Louis, MO 63110, USA. toddr@wustl.edu

Abstract

OBJECTIVE:

To determine the 5-year prospective stability of population-based and DSM-IV subtypes of attention-deficit/hyperactivity disorder (ADHD) as well as to explore predictors of stability.

METHOD:

A total of 708 twins ages 7 to 19 years who were identified from birth records of the state of Missouri and had participated in a study of ADHD were reassessed 5 years later in a blinded fashion. Stabilities of DSM-IV and population-based ADHD subtypes were compared using percentage of agreement with significance tested by the kappa statistic. Predictors of stability of subtype diagnosis were determined using multivariate logistic regression.

RESULTS:

In general, 5-year ADHD subtype stability was poor to modest and ranged from 11.1% to 24.0% for DSM-IV for subtypes and from 14.3% to 35.3% for clinically significant population-derived subtypes. There were no predictors of diagnostic stability that applied across subtypes. There were subtype-specific predictors including a diagnosis of oppositional defiant disorder for DSM-IV primarily inattentive ADHD; lower verbal IQ for DSM-IV combined type ADHD; and younger age, oppositional defiant disorder, and medication use for population-defined severe combined ADHD.

CONCLUSIONS:

Population-defined ADHD subtype criteria demonstrated modestly improved diagnostic stability over 5 years compared to DSM-IV subtypes. Few correlates or predictors of stability were identified.

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PMID:
18174828
[PubMed - indexed for MEDLINE]
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