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Epidemiology and Treatment Trends of Rheumatoid Arthritis with Dementia in Japan: A Nationwide Claims Database Study

Epidemiology and Treatment Trends of Rheumatoid Arthritis with Dementia in Japan: A Nationwide Claims Database Study

Status
Active, not recruiting
Phases
Unknown
Study type
Unknown
Source
JPRN
Registry ID
JPRN-jRCT1030250036
Enrollment
450000
Registered
2025-04-28
Start date
2025-04-28
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

rheumatoid arthritis

Interventions

None listed

Sponsors

Tada Masahiro
Lead Sponsor
Mito Takanori
Collaborator

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Patients had to fulfill all of the following criteria to be included in the study: aged >=65 years at the time of RA diagnosis between 1 January 2015 and 31 December 2023 (ICD-10 codes M05, M060, M062, M063, M068, M069, excluding RS3PE syndrome [standard injury code: 8844120], wrist deformity [standard injury code: 8845190], and ulnar deviation [standard injury code: 8845158]); with at least one prescription for a DMARD or oral glucocorticoid within 1 year of the first RA diagnosis; and with a record of data in the DeSC database for at least 180 days prior to the index date.

Exclusion criteria

Exclusion criteria: No exclusion criteria were set for the primary study endpoint. For secondary endpoints, individuals who lacked prescription records for DMARDs or oral corticosteroids within 1 year of the index date were excluded.

Design outcomes

Primary

MeasureTime frame
The primary endpoint was the prevalence of dementia by year (2015-2023) in all patients with RA aged >=65 years.

Secondary

MeasureTime frame
The secondary endpoints were: annual incidence of dementia in patients with RA aged 65-74 and >=75 years, status of DMARD prescriptions in patients with RA aged 65-74 and >=75 years who developed dementia, and survival time analysis for new prescriptions or increased doses of oral glucocorticoids in patients aged 65-74 and >=75 years who developed dementia.

Contacts

Public ContactKeita Fujimoto

Eisai Co., Ltd.,

k3-fujimoto@hhc.eisai.co.jp+81-90-6749-5344

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026