Understanding Functional Vulnerability in Older Adults with Epilepsy

Epilepsy in late life presents complex neurological, cognitive, and functional challenges. For clinicians caring for older adults with epilepsy, seizure frequency represents only one component of disease burden. Daily autonomy often erodes quietly before catastrophic clinical events occur. Instrumental activities of daily living comprise complex tasks necessary for community independence. These tasks include managing personal finances, preparing meals, taking medications accurately, and navigating transportation. While physical mobility often remains preserved, neurocognitive changes undermine these instrumental activities. Consequently, patients face escalating safety hazards and unexpected losses of personal independence. Historically, clinical teams focused almost exclusively on electroencephalographic stabilization and seizure reduction. However, emerging evidence indicates that functional disability develops frequently despite adequate seizure control. In addition, neurodegenerative pathology often overlaps with late-life seizure disorders. Because instrumental tasks demand executive control, memory integration, and processing speed, they serve as sensitive barometers of underlying cerebral integrity. Therefore, assessing functional independence provides vital diagnostic insight into overall brain health. Evaluating these competencies early helps clinicians identify patients who require multidisciplinary intervention.

The BrACE Multicenter Protocol and Functional Stratification

To investigate functional trajectories, investigators launched the Brain Aging and Cognition in Epilepsy cohort across three academic medical centers. This prospective study enrolled individuals aged fifty-five years and older with early-onset epilepsy or late-onset unexplained epilepsy. Researchers evaluated functional autonomy using the Pfeffer Functional Activities Questionnaire. This validated instrument assesses ten complex instrumental domains, yielding scores from zero to thirty where higher numbers reflect greater impairment. Specifically, the authors categorized functional status using validated clinical cutoffs. A score of two or higher established mild cognitive impairment-level functional deficit. Meanwhile, a score of five or higher designated dementia-level functional impairment. In addition to measuring daily functioning, investigators administered the Montreal Cognitive Assessment alongside comprehensive neuropsychological batteries. Furthermore, researchers applied Firth penalized logistic regression models to identify baseline clinical predictors of functional decline. They also tracked longitudinal trajectories using exploratory linear regression. By combining granular neuropsychological testing with functional scales, the BrACE protocol established a robust framework for monitoring neurocognitive decline in aging patients.

Key Findings: MCI-Level and Dementia-Level Functional Deficits

The baseline analysis revealed striking levels of functional compromise among the fifty-seven enrolled participants. The cohort exhibited a mean age of sixty-six years, and women comprised just over half of the sample. Remarkably, 38.6 percent of participants met criteria for mild cognitive impairment-level functional impairment. Furthermore, 17.5 percent demonstrated profound deficits consistent with dementia-level impairment. These proportions demonstrate that functional disability affects a substantial subset of mature epilepsy patients. Univariate analyses revealed that higher scores on the Functional Activities Questionnaire correlated directly with lower educational attainment. In addition, patients living in neighborhoods with higher area-deprivation index values experienced significantly worse functional performance. Early-onset epilepsy also emerged as a significant predictor of poorer daily functioning. Conversely, late-onset unexplained epilepsy exhibited distinct patterns of functional preservation in specific domains. Importantly, individuals with functional impairment displayed significantly lower global cognitive scores on the Montreal Cognitive Assessment. Domain-specific cognitive testing showed pronounced executive dysfunction and memory retrieval deficits. Consequently, affected participants reported significantly lower health-related quality of life compared to functionally intact peers.

Clinical Determinants and the Longitudinal Trajectory of Decline

The BrACE study highlights several critical predictors that drive functional degradation. Socioeconomic disadvantage and lower educational attainment clearly heighten vulnerability to daily functional decline. Therefore, social determinants of health amplify the neurological burden of chronic seizure disorders. Moreover, the age of epilepsy onset plays a critical role in long-term functional autonomy. Individuals with early-onset epilepsy endure decades of recurrent seizures, cumulative head trauma, and chronic anti-seizure medication exposure. Consequently, this sustained neurological burden accelerates cerebral aging and compromises executive networks. In contrast, late-onset epilepsy often signals occult cerebrovascular disease or incipient neurodegenerative pathology like Alzheimer disease. Furthermore, longitudinal analysis demonstrated progressive decline over follow-up visits, confirming an active neurodegenerative trajectory. Exploratory linear regression models identified multiple baseline factors that accelerated functional deterioration over time. Active seizures and baseline cognitive deficits significantly accelerated this loss of autonomy. However, the study demonstrated that functional loss progresses even when patients maintain stable seizure control. Accordingly, regular longitudinal assessments remain essential to detect insidious decline and adjust supportive care promptly.

Practice Implications for Neurologists and Geriatricians

These findings carry direct clinical implications for neurologists, geriatricians, and primary care physicians. Routine neurological consultations often prioritize seizure diaries and antiepileptic drug levels. However, clinicians must expand their clinical focus to include formal functional evaluations. Incorporating brief caregiver-reported questionnaires, such as the Functional Activities Questionnaire, allows early identification of functional decline. In addition, physicians should routinely evaluate medication adherence capabilities. Because nearly forty percent of aging epilepsy patients show functional compromise, self-management of complex pharmacotherapy presents serious risks. Patients may inadvertently skip doses, leading to breakthrough seizures, or double doses, triggering severe neurotoxicity. Furthermore, clinicians should address modifiable lifestyle factors and manage vascular comorbidities aggressively. Referral to occupational therapy provides tailored environmental modifications that support independent living and reduce caregiver stress. Early functional screening also guides timely discussions regarding driving safety, power of attorney, and home health assistance. By integrating cognitive and functional monitoring into standard epilepsy care, physicians can safeguard patient autonomy and enhance overall quality of life.

How does epilepsy impair instrumental activities of daily living in older adults?

Epilepsy impairs instrumental activities through recurrent seizures, cumulative network disruption, and associated cognitive deficits. Complex daily tasks require intact executive function, processing speed, and episodic memory. When seizures damage frontotemporal neural pathways, patients lose the ability to plan, organize, and execute multi-step activities like managing finances or preparing meals. Additionally, sedative anti-seizure medications and postictal confusion exacerbate attention deficits, compounding functional decline and increasing dependence on family caregivers.

What screening tools should clinicians use to evaluate functional decline in epilepsy?

Clinicians should combine cognitive screening tests with informant-based functional questionnaires during routine clinical visits. The Pfeffer Functional Activities Questionnaire provides a reliable, validated assessment of ten complex instrumental domains. When clinicians pair this questionnaire with the Montreal Cognitive Assessment, they effectively identify mild cognitive impairment and dementia-level functional loss. This combined evaluation detects subtle executive deficits early, allowing healthcare providers to implement supportive safety interventions before accidental injuries or medication errors occur.

Why is early functional assessment crucial for medication management in older adults?

Early functional assessment is critical because managing complex anti-seizure medication regimens requires intact executive memory and organization. Over one-third of older epilepsy patients develop significant instrumental impairments that directly hinder medication adherence. When patients mismanage dosages, they face severe risks of breakthrough seizures from underdosing or drug toxicity from unintentional overdosing. Identifying functional vulnerability allows clinicians to involve caregivers promptly, prescribe simplified dosing schedules, and deploy automated pill dispensers to ensure safety.

Disclaimer: This content is for informational and educational purposes only... Refer to the latest local and national guidelines for clinical practice.

References

1. Zawar I et al. Instrumental activities of daily living in older adults with epilepsy: A cross-sectional and longitudinal multicenter study. Epilepsia. 2026 Sep 07. doi: 10.1002/epi.70478. PMID: 42704320.


2. Zawar I, Kapur J, Mattos MM, Manning C, Hashmi SA, Quigg M. Active seizures predict worse instrumental activities of daily living in individuals with normal cognition and dementia. Ann Clin Transl Neurol. 2025;12(8):1608-1618.


3. Pfeffer RI, Kurosaki TT, Harrah CH Jr, Chance JM, Filos S. Measurement of functional activities in older adults in the community. J Gerontol. 1982;37(3):323-329.