Objective: To determine the prevalence of epilepsy/seizure (epi/sz) comorbid with other neurologic disorders in elderly nursing home residents and to examine demographic and regional variability and associations with clinical characteristics.Methods: We studied 5 cross-sectional cohorts of all residents in any Medicare/Medicaid-certified nursing home in the United States on July 15 of each year from 2003 to 2007. Epi/sz was identified by ICD-9 codes (345.xx or 780.39) or check box (Minimum Data Set). Epi/sz prevalence was stable across all years, so only 2007 data were examined further. Logistic regression with generalized estimating equations was used to model cross-sectional prevalence of epi/sz as a function of demographics and neurologic comorbidities of interest, with adjustment for clinical characteristics, including cognitive status, comorbidity burden, medication burden, and activities of daily living.Results: Point prevalence of epi/sz in 2007 was 7.7% (n 5 91,372 of N 5 1,186,579) differing by geographical region, race/ethnicity, age group, and sex. Neurologic conditions having the highest association with epi/sz were brain tumor (epi/sz prevalence 23.4%-35.2%), head injury (17.9%), hemiplegia (17.7%), and stroke (13.7%). Epi/sz comorbid with stroke or dementia had a strong decreasing association with age (65-74 years had z3.8-times higher odds of epi/sz than 851 years). Activities of daily living, comorbidity burden, and cognition scores were worse in persons with than without epi/sz.
Conclusions:The prevalence of epi/sz in the elderly nursing home population is .7-fold higher compared to community-dwelling elderly and is 7 to 30 times higher among those with certain comorbid neurologic conditions. Demographics and clinical characteristics had weaker associations with epi/sz prevalence. Neurology ® 2017;88:750-757 GLOSSARY ASD 5 antiseizure drug; epi/sz 5 epilepsy/seizure; ICD-9 5 International Classification of Diseases, ninth revision; MDS 5 Minimum Data Set; MS 5 multiple sclerosis; NH 5 nursing home; OR 5 odds ratio.Because of their general health, elderly individuals are much more likely to have severe consequences from a seizure than younger persons.1 With increasing concern regarding the ability to provide adequate and appropriate care to the nursing home (NH) population, it is important to define the epidemiology of epilepsy in this cohort. In community-dwelling elderly, the prevalence of epilepsy is z1.1%.2,3 A majority of these cases are located in the geographic Stroke Belt. [4][5][6] Neurologic conditions comorbid with epilepsy are also common in NH elderly. Although the number of elderly will more than double in the United States, approaching 71.5 million by 2030, 7 and the lifetime probability of a person entering an NH before death is 43% to 46%, 8 there has not been a systematic evaluation of the prevalence of epilepsy with other neurologic disorders or the activity or cognitive status of these individuals.We obtained the Minimum Data Set (MDS) assessments completed on all resi...