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Obstructive sleep apnea is associated with seizure occurrence in older adults with epilepsy.

Chihorek AM, Abou-Khalil B, Malow BA

Department of Neurology, Sleep Disorders Division, Vanderbilt University School of Medicine, Nashville, TN 37232-2551, USA.

BACKGROUND: Although epileptic seizures occur more commonly in older adults, their occurrence in this age group is often unexplained. One unexplored precipitant of seizures in older adults is obstructive sleep apnea (OSA), which is also more common in this age group. Our objective was to investigate whether OSA is associated with seizure exacerbation in older adults with epilepsy. METHODS: Polysomnography was performed in older adult patients with late-onset or worsening seizures (Group 1, n = 11) and those who were seizure-free or who had improvement of seizures (Group 2, n = 10). RESULTS: Patients in Group 1 had a significantly higher apnea-hypopnea index than patients in Group 2 (p = 0.002). Group 1 patients also had higher Epworth Sleepiness Scale scores (p = 0.009) and higher scores on the Sleep Apnea Scale of the Sleep Disorders Questionnaire (p = 0.04). The two groups were similar in age, body mass index, neck circumference, number of antiepileptic drugs currently used, and frequency of nocturnal seizures. CONCLUSIONS: Obstructive sleep apnea is associated with seizure exacerbation in older adults with epilepsy, and its treatment may represent an important avenue for improving seizure control in this population.

Published 6 November 2007 in Neurology, 69(19): 1823-7.
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