Do gabapentinoids track with later dementia?
Among 206,802 Taiwanese adults, gabapentin or pregabalin use was linked to higher dementia incidence (980 vs 605 per 100,000 person-years; aHR 1.45), with aHR 3.16 under age 50 and a cumulative-dose gradient.
Source
The association between Gabapentin or Pregabalin use and the risk of dementia: an analysis of the National Health Insurance Research Database in Taiwan
Study at a glance
- Design
- Cohort — Retrospective Taiwan NHIRD/LHID 2000–2017 matched cohort of gabapentin or pregabalin users vs 1:5 propensity-matched non-users
- N
- N=206802 · 34,467 exposed and 172,335 unexposed adults from a 2-million-person 2005 LHID sample
- Population
- Taiwanese adults in the National Health Insurance Research Database who did or did not receive gabapentin or pregabalin
- Outcome
- Incident dementia (incidence per 100,000 person-years; adjusted HR, including age and cumulative dose strata)
Structured fields used in claim comparison tables when every cited study has a complete layer.
What they did
Built a 2000–2017 LHID cohort from 2 million NHIRD enrollees, compared 34,467 gabapentin/pregabalin users with 172,335 non-users matched 1:5 on age, sex, and index date, and estimated multivariate hazard ratios for dementia, including dose and age strata.
What they found
Dementia incidence was 980.60 vs 605.48 per 100,000 person-years. Adjusted HR 1.45 (1.36–1.55). Risk rose with cumulative defined daily doses and was significant in all ages, but higher in patients <50 (HR 3.16; 2.23–4.47).
The limits
What it doesn't show
Claims matching cannot prove gabapentinoids cause dementia; confounding by pain, epilepsy, or psychiatric comorbidity remains, and results are from one insurance system.
Key terms
- Gabapentin/pregabalin
- GABA-analog anticonvulsants/neuropathic-pain drugs that bind α2δ calcium channels.
- NHIRD/LHID
- Taiwan insurance claims; 2005 LHID is a 2-million-person random NHIRD sample.
- Propensity matching
- 1:5 matching on age, sex, and index date for unexposed comparators.
- Adjusted hazard ratio
- Multivariable Cox HR; 1.45 for dementia in exposed vs matched unexposed.
- cDDD
- Cumulative defined daily dose; higher cumulative exposure tracked higher dementia risk.
- Incidence rate
- 980.60 vs 605.48 dementia cases per 100,000 person-years.
Flashcards
Research intelligence for this paper
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Quiz yourself
Analyzed N was about:
Common questions
How large was the analyzed cohort?
206,802 patients (34,467 exposed; 172,335 unexposed).
What was the adjusted HR?
1.45 (95% CI 1.36–1.55).
Who had the largest relative risk?
Younger patients (age <50), HR 3.16.
Did dose matter?
Yes—risk increased with higher cumulative defined daily doses.
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