Epidemiological characteristics of rheumatoid arthritis in Japan: Prevalence estimates using a nationwide population-based questionnaire survey

Objectives: To elucidate the epidemiological characteristics of patients with rheumatoid arthritis (RA) in Japan using data from the Comprehensive Survey of Living Conditions, a nationwide questionnaire survey conducted in 2016. Methods: In total, 222,365 men and 245,251 women aged ≥16 years were in...

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Bibliographic Details
Published in:Modern rheumatology 2020-11, Vol.30 (6), p.941-947
Main Authors: Kojima, Masayo, Nakayama, Takeo, Tsutani, Kiichiro, Igarashi, Ataru, Kojima, Toshihisa, Suzuki, Sadao, Miyasaka, Nobuyuki, Yamanaka, Hisashi
Format: Article
Language:English
Subjects:
Activities of Daily Living
Adult
Aged
Arthritis, Rheumatoid - epidemiology
Comprehensive survey of living condition
disease burden
Female
Humans
Japan - epidemiology
Male
Middle Aged
national data
Prevalence
prevalence of patients
Surveys and Questionnaires
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Summary:Objectives: To elucidate the epidemiological characteristics of patients with rheumatoid arthritis (RA) in Japan using data from the Comprehensive Survey of Living Conditions, a nationwide questionnaire survey conducted in 2016. Methods: In total, 222,365 men and 245,251 women aged ≥16 years were included in the study. RA patients were defined as those who reported 'currently receiving treatment for RA at hospitals, clinics, or a facility for Japanese traditional massage, acupuncture, moxibustion, or judo-orthopedics.' The number of RA patients was estimated from the age-specific prevalence and total Japanese population in 2016. Further, the prevalence of individuals experiencing difficulties in activities of daily living due to health problems and those with mental distress as evaluated by K6 Scale was examined. Results: The estimated number and prevalence of RA in Japan with 95% confidence interval was 822 (768-880) thousand and 0.75% (0.70-0.80%). The population peaked in the late 60s, and the prevalence continued increasing until the early 80s, regardless of sex. Compared with non-RA participants, RA patients were more likely to experience difficulties in activities and to be distressed. Conclusion: High prevalence of RA in older age and mental and physical burden among RA patients were confirmed.
ISSN:1439-7595
1439-7609
DOI:10.1080/14397595.2019.1682776