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Patients with early arthritis who fulfil the 1987 ACR classification criteria for rheumatoid arthritis but not the 2010 ACR/EULAR criteria
  1. Se Jin Jung,
  2. Sang-Won Lee,
  3. You Jung Ha,
  4. Kwang-Hoon Lee,
  5. Yoon Kang,
  6. Min-Chan Park,
  7. Soo-Kon Lee,
  8. Yong-Beom Park
  1. Division of Rheumatology, Department of Internal Medicine, Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, South Korea
  1. Correspondence to Dr Yong-Beom Park, Department of Internal Medicine, Yonsei University College of Medicine, 250 Sungsanno, Seodaemun-gu, Seoul, 120-752, South Korea; yongbpark{at}

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Recently, a joint working group of the American College of Rheumatology (ACR) and the European League Against Rheumatism (EULAR) was formed to develop new classification criteria for rheumatoid arthritis (RA),1 2 and announced the 2010 ACR/EULAR classification criteria for identifying patients with early RA.3 The present study was performed in order to determine whether the newly developed 2010 ACR/EULAR criteria would include patients who were previously diagnosed with early RA according to the 1987 ACR criteria.4

We studied 170 patients with early RA patients, who had been classified as having RA according to the 1987 ACR criteria. Early RA was defined by less than 12 months of symptoms. The 2010 ACR/EULAR criteria were applied to patients at the exact time point when they were identified as fulfilling the 1987 ACR criteria. The clinical characteristics and laboratory findings …

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  • Funding This study was supported by a grant from the Korea Healthcare Technology R&D project, Ministry of Health and Welfare, Republic of Korea (A102065).

  • Competing interests None.

  • Ethics approval This study was approved by the Institutional Review Board of Severance Hospital, Yonsei University Health System, Seoul, Korea.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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