Sjögren's disease & overlap diseases

Risk of cognitive disorders in patients with primary Sjögren’s disease: data from Korean Health Insurance Service

RMD OpenPublished Retrospective cohort study

Main finding · Total cognitive disordersResult — go to the resultAdjusted hazard ratio 1.48 95% CI 1.36–1.63

Authors' conclusion

pSjD was associated with increased risks of multiple cognitive disorders.

Study context

Population
Patients newly diagnosed with pSjD, 2010–2021, and matched controls; Korean National Health Insurance Service datamatched cohort
Participants
12,731 vs 36,514
Exposure
pSjD vs propensity score-matched controls
  • pSjDn = 12,731
  • Controlsn = 36,514reference
Outcome
Composite of:
  • Alzheimer's dementia
  • Vascular dementia
  • Secondary dementia
  • Unclassified dementia
  • Mild cognitive impairment (total cognitive disorders)
Methodological detailsnationwide, propensity score-matched, multivariable Cox regression, age-stratified analyses
  • Nationwide
  • Propensity score-matched
  • Multivariable Cox regression
  • Age-stratified analyses

Main finding

Total cognitive disorders

Adjusted hazard ratio

1.48

95% CI 1.36–1.63

pSjDvs Controls
aHR 1.48 (95% CI 1.36–1.63)

As reported in the abstract

Observational data: associations, not effects.

Further findings

OutcomeaHR (95% CI)
Alzheimer's dementia1.48 (1.35–1.63)
Secondary dementia2.24 (1.45–3.48)
Unclassified dementia1.43 (1.21–1.70)
Mild cognitive impairment1.62 (1.41–1.85)
Mild cognitive impairment, age <65 years (subgroup)1.46 (1.06–2.01)

Age 65-74 years (subgroup): total cognitive disorders, Alzheimer's dementia (AD) and mild cognitive impairment (MCI)

pSjD associated with increased risks of total cognitive disorders, AD and MCI

Original publication

Risk of cognitive disorders in patients with primary Sjögren’s disease: data from Korean Health Insurance Service. RMD Open. Published 24 September 2026. doi:10.1136/rmdopen-2026-006864

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