Both depression and anxiety disorders are relatively common psychiatric disorders in patients with epilepsy. Pooled prevalence rates in this population are estimated at 22.9% and 20.2%, 1 which is much higher when compared to the prevalence of depression and anxiety disorders worldwide (4.4% and 3.6%). 2 Although epilepsy relatively often co-occurs with intellectual disability (ID), 3 literature on the presence of mood disorders among patients with both epilepsy and ID is scarce. Knowledge of this relationship is important as it might influence quality of life in these patients.Depressive and anxiety symptoms can be associated with epilepsy for multiple reasons. They may have the same underlying neurobiological aetiology 4 or result from epilepsy due to seizure-related or psychosocial factors, such as increased dependence, experienced stigma, and poor seizure control. 5,6 Results from a systematic review indicate that having an epilepsy diagnosis is associated with an increase of depressive symptoms in adults with ID and that a severe Objective: Depression and anxiety symptoms are common among patients with epilepsy, but are relatively under-researched in patients with both epilepsy and intellectual disability (ID). The aim was to investigate whether epilepsy and ID characteristics are associated with mood, anxiety, and quality of life.
Materials and Methods:Adult patients with epilepsy and ID who rely on tertiary epilepsy care were included (N = 189). Mood, anxiety, and quality of life were assessed by standardized questionnaires. Epilepsy and ID characteristics were retrieved from patient charts or determined by psychometric instruments.Results: Elevated levels of depressive and anxiety symptoms were present in 21.7% and 12.7%, respectively. Anxiety was significantly associated with a focal epilepsy type and ID domain discrepancy (substantial difference between two domains of adaptive behavior), but was negatively related to seizure frequency and drug load of mood-stabilizing antiepileptic drugs. Depressive symptoms were not significantly related to epilepsy characteristics, but a severe ID and ID domain discrepancy was associated with more depressive symptoms. Quality of life was significantly worse in those with multiple seizure types and ID domain discrepancy.
Conclusion:Whereas anxiety and quality of life are associated with individual epilepsy characteristics, this could not be confirmed for depressive symptoms in patients with epilepsy and ID, despite its high prevalence. K E Y W O R D S anxiety disorder, depression, developmental disability, mental health, seizures How to cite this article: Snoeijen-Schouwenaars FM, van Ool JS, Tan IY, Aldenkamp AP, Schelhaas HJ, Hendriksen JGM. Mood, anxiety, and perceived quality of life in adults with epilepsy and intellectual disability. Acta Neurol Scand.