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MR Vol.10 No.3 indexに戻る
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MODERN RHEUMATOLOGY
Vol.10 No.3 |
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Study on sensitivity and specificity of diagnostic
criteria for early rheumatoid arthritis |
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| N. Yamamoto1, H. Hagino1, R. Teshima1 |
| Department of Orthopaedic Surgery, Faculty
of Medicine, Tottori University, 36-1 Nishi-cho, Yonago 683-8504,
Japan |
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| Abstract |
| Abstract Sensitivity and specificity were compared
among the American College of Rheumatology (ACR) 1987 classification
criteria, the Yamasaki diagnostic criteria, and the Japan Rheumatism
Association (JRA) diagnostic criteria for early rheumatoid arthritis
(RA). The study included 90 patients who consulted our department
for the first time within 1 year after onset and were suspected of
having RA (final diagnosis: RA 45 cases, non-RA 45 cases). We investigated
whether physical and laboratory findings at the first examination
met these three sets of criteria to determine the sensitivity and
specificity of each set of diagnostic criteria. Moreover, the sensitivity
and specificity of each item in the diagnostic criteria set were
similarly determined. The sensitivity of the ACR 1987 classification
criteria, the Yamasaki diagnostic criteria, and the JRA diagnostic
criteria for early RA were 71.1%, 88.9%, and 95.6%, respectively,
and their specificities were 100%, 93.3%, and 77.8%, respectively.
In a study on each diagnostic item, observation for 1 week was considered
to be sufficient for morning stiffness, swelling in three joint areas,
and symmetrical swelling, while observation for a more prolonged
period seemed to be necessary for swelling of the finger and hand
joints. The Yamasaki diagnostic criteria are appropriate for the
diagnosis of early RA, while the JRA diagnostic criteria are suitable
for screening. |
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| Key words |
| Key words Diagnostic criteria ・ Early rheumatoid
arthritis ・ Rheumatoid arthritis |
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