Jinxia Zhao, Yin Su, Ru Li, Hua Ye, Qinghua Zou, Yongfei Fang, Huaxiang Liu, Xingfu Li, Jialong Guo, Liqi Bi, Fei Gu, Lingyun Sun, Yifang Mei, Zhiyi Zhang, Lina Chen, Ping Zhu, Guangtao Li, Zhuoli Zhang, Xiaomei Leng, Yan Zhao, Li Jiang, Hejian Zou, Yi Zhao, Yi Liu, Lei Li, Hongyuan Wang, Xiangyuan Liu, Zhanguo Li
OBJECTIVES: To develop classification criteria for early rheumatoid arthritis (ERA) based on a large cohort of early inflammatory arthritis patients and to evaluate the performance of these criteria. METHODS: The study population comprised a cohort of early inflammatory arthritis patients with symptom duration less than one year. Classification criteria of ERA were developed by incorporating the most sensitive or specific variables. Performance of the ERA criteria, 1987 ACR and 2010 ACR/EULAR criteria were evaluated...
September 2014: Clinical and Experimental Rheumatology