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Time-Dependent Risk of Dementia Following Epilepsy Diagnosis: A Nationwide Cohort Study in South Korea
Youngoh Bae, Chaeyoon Kang, Unbi Choi, Hohyun Jung, Seung Won Lee. Archives of Clinical Neuropsychology, 2025-05-15
Topic: Risk, prevention and care in population studies
Plain-language summary
Dementia risk was significantly higher in patients with epilepsy compared with that of controls (IRR: 3.65; 95% CI: 3.14-4.24), especially within the first 2 years post-diagnosis (aHR: 5.42; 95% CI: 4.30-6.83), peaking between 8 and 10 years (aHR: 8.25; 95% CI: 3.15-21.5). Younger patients (<60 years) were at higher risk, particularly during the first 2 years (aHR: 12.32 vs. 4.70). Men exhibited a greater risk than women in the initial 2 years post-diagnosis (aHR: 6.64 vs. 4.57). The risk of dementia in patients with epilepsy varies with time since diagnosis, age, and sex. Early cognitive assessment and targeted interventions, particularly in younger male patients, are crucial to reduce the long-term burden of dementia. These results provide critical insight for clinicians and public health strategists to enhance the care of patients with epilepsy.
Cite this study APA, Vancouver, BibTeX · download .bib or .ris
APA 7th
Bae, Y., Kang, C., Choi, U., Jung, H., & Lee, S. W. (2025). Time-Dependent Risk of Dementia Following Epilepsy Diagnosis: A Nationwide Cohort Study in South Korea. Archives of Clinical Neuropsychology. https://doi.org/10.1093/arclin/acaf047
Vancouver
Bae Y, Kang C, Choi U, Jung H, Lee SW. Time-Dependent Risk of Dementia Following Epilepsy Diagnosis: A Nationwide Cohort Study in South Korea. Archives of Clinical Neuropsychology. 2025. doi:10.1093/arclin/acaf047. PMID: 40455643.
BibTeX
@article{bae2025-40455643,
author = {Bae, Youngoh and Kang, Chaeyoon and Choi, Unbi and Jung, Hohyun and Lee, Seung Won},
title = {{Time-Dependent Risk of Dementia Following Epilepsy Diagnosis: A Nationwide Cohort Study in South Korea}},
journal = {Archives of Clinical Neuropsychology},
year = {2025},
doi = {10.1093/arclin/acaf047},
pmid = {40455643},
url = {https://doi.org/10.1093/arclin/acaf047}
}
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Key findings
- Dementia risk was significantly higher in patients with epilepsy compared with that of controls (IRR: 3.65; 95% CI: 3.14-4.24), especially within the first 2 years post-diagnosis (aHR: 5.42; 95% CI: 4.30-6.83), peaking between 8 and 10 years (aHR: 8.25; 95% CI: 3.15-21.5).
- Younger patients (<60 years) were at higher risk, particularly during the first 2 years (aHR: 12.32 vs. 4.70).
- Men exhibited a greater risk than women in the initial 2 years post-diagnosis (aHR: 6.64 vs. 4.57).
- The risk of dementia in patients with epilepsy varies with time since diagnosis, age, and sex.
- Early cognitive assessment and targeted interventions, particularly in younger male patients, are crucial to reduce the long-term burden of dementia.
Why it matters
This nationwide cohort study found that people with epilepsy had a higher risk of dementia, especially in the first two years after diagnosis and among younger patients. The findings suggest early cognitive assessment, but do not provide a treatment, cure, or prevention.
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Study details
- Study designcohort study
- Participants2,740
- Effect sizeRR: 3.65; aHR: 5.42; aHR: 8.25
- Evidence strengthModerate
How this study scored 53/100
Published in a peer-reviewed journal, and it is a cohort study following people over time. Scored zero for randomized / blinded because the record does not state it.
| Component | Points | Why |
|---|---|---|
| Journal tier | 7 / 10 | Tier 3 — peer-reviewed journal (Archives of Clinical Neuropsychology) |
| Journal's citation record | 2 / 4 | Archives of Clinical Neuropsychology: journal h-index 151 (OpenAlex, 2026-10-29) |
| Study design | 7 / 12 | A cohort study following people over time |
| Strength of evidence | 3 / 5 | Rated “moderate” in our summary |
| Peer-review validation | 10 / 10 | Peer-reviewed. Published as an article in a named peer-reviewed journal. |
| How recent | 4 / 5 | 2025 — within 3 year(s) of the newest study here |
| Sample size | 3 / 4 | 2,740 participants |
| Effect reported | 3 / 3 | Effect reported with a statistic (interval, p-value, ratio or similar) |
| Studied in people | 3 / 3 | Studied in people (participant count stated) |
| Randomized / blinded | 0 / 2 | No randomization or blinding stated — scores zero (not stated in the record — scored 0) |
| Times cited | 1 / 7 | Cited 2 times (OpenAlex, 2026-10-10) |
| Citations per year | 0 / 5 | 0.7 citations a year over 3 year(s) since 2025 |
| Impact for its field and year | 2 / 6 | Cited 1.3× the average for papers of its field and year (OpenAlex FWCI) |
| Cited by studies here | 0 / 6 | No other study in this library cites it |
| Still being cited | 0 / 4 | Cited 2 times in 2024–2026 (2026 still in progress; OpenAlex) |
| Senior author's track record | 3 / 4 | Last-listed author Seung Won Lee: h-index 74 (OpenAlex, whole career) |
| Institution's track record | 1 / 3 | Sungkyunkwan University: institution h-index 788 (OpenAlex) |
| Multicenter collaboration | 2 / 3 | OpenAlex lists 4 institution(s) in 1 country |
| Indexed in PubMed | 2 / 2 | Indexed in PubMed (PMID 40455643) |
| Free to read | 0 / 2 | Behind a paywall — scores zero |
| Total | 53 / 100 | — |
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