The aim of this study is to investigate the safety and effectiveness of tocilizumab (Actemra®) using Chinese Rheumatology Information Platform (CRIP) on Chinese Rheumatology Data Centre (CRDC, http://www.crdc.org.cn/) in Chinese RA patients.

Tocilizumab (Actemra®) is a humanized monoclonal antibody targeting the human IL-6 receptor, which inhibits the binding of this cytokine to its receptor. It is the first monoclonal antibody developed for RA treatment with this mechanism of action and has been approved by regulatory authorities in China since 2013. Data from five phase III studies with over 4000 recruited patients have shown that tocilizumab at a dose of 8 mg/kg, in combination with methotrexate/DMARDs or as monotherapy, can produce a quick and clinically relevant improvement in RA signs and symptoms, health status, and prevent joint damage, for both patients who have not been previously treated with and refractory to methotrexate, other DMARDs or anti-TNF agents. However, in real-world clinical setting, the safety profile and treatment pattern with regard to the persistence on tocilizumab and the efficacy are not clear in China. The aim of this study is to investigate the safety and effectiveness of tocilizumab using Chinese Rheumatology Information Platform (CRIP) on Chinese Rheumatology Data Centre (CRDC, http://www.crdc.org.cn/) in Chinese RA patients.

Inclusion Criteria:

• Patients at least 18 years of age.
• Patients with a diagnosis of RA according to the revised (2010) ACR criteria.
• Patients per treating physician's judgment to treat with Tocilizumab.
• Signed written informed consent

Exclusion Criteria:

• Patients are receiving or have received any investigational agent 4 weeks (or 5 half-lives of investigational agent, whichever is longer) prior to enrollment of this study.
• Subjects with contra-indications to Tocilizumab therapy as detailed in the label (with known hypersensitivity to Tocilizumab or accessories; or with active infections.).

Approximately 2500 participants will be enrolled in this study from Approximately 50 investigational centers in China. The study population will include patients with RA, according to 2010 ACR criteria, in whom the treating physician has made the decision to treat with Tocilizumab. Furthermore, patients must have given their informed consent and must not meet any of the exclusion criteria.