Inattentive symptoms of ADHD are related to evening orientation
Hervé Caci1, Jacques Bouchez, Franck J Baylé
1Université Nice Sophia Antipolis, Nice--Cedex 3, France. caci.h@chu-nice.fr
Objective:
Morningness is a stable characteristic of individuals, related to impulsivity and novelty seeking. The evening orientation is a risk factor for psychiatric conditions such as depression and personality disorders. The authors hypothesized that adults suspected of having ADHD are more evening oriented than adults without ADHD.
Method:
Exploratory factor analyses were performed on the polychoric correlation matrices of the full Adult Self-Report Scale for ADHD (ASRS) and the Composite Scale of Morningness (CSM).
Results:
As expected, two factors for the ASRS--Inattention and Impulsivity- Hyperactivity--and three factors for the CSM were retrieved. All three CSM factors correlated negatively with ASRS Inattention, none with ASRS Impulsivity-Hyperactivity.
Conclusion:
Inattention is more strongly related to eveningness than is Impulsivity-Hyperactivity, and therefore eveningness may constitute an endophenotype of the predominantly inattentive subtype of ADHD. These findings need to be replicated in a patient population with a standardized assessment of sleep quality.
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