Testing the dual pathway model of ADHD in obesity: a pilot study
Saskia Van der Oord1,2,3, Caroline Braet4, Samuele Cortese5,6,7
1Clinical Psychology, Faculty of Psychology and Educational Sciences, KU Leuven, Louvain, Belgium. saskia.vanderoord@kuleuven.be.
Introduction:
There may be shared neuropsychological dysfunctions in ADHD and obesity. This study tested a neuropsychological model of ADHD (reward/executive dysfunctioning) in individuals with obesity. Furthermore, the association between co-morbid binge eating and reward/executive dysfunction was explored.
Methods:
Reward/executive dysfunctioning was assessed using both neuropsychological measures and questionnaires in individuals (aged 17-68) with obesity (N = 39; mean BMI = 39.70) and normal weight (N = 25; mean BMI = 22.94).
Results:
No significant differences emerged between individuals with and without obesity on the outcome measures. However, individuals with obesity and binge eating showed significantly more self-reported delay discounting and inattention than those individuals with obesity but without binge eating. When controlling for inattention, this difference in delay discounting was no longer significant.
Discussion:
Not obesity alone but obesity with binge eating was specifically associated with a mechanism often reported in ADHD, namely delay discounting. However, this effect may be more driven by inattention.
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