This is an epidemiological, multicenter, retrospective study to analyze the management of rheumatoid arthritis (RA) in usual clinical practice in Spain. Two groups of patients will be analyzed: individuals who have had RA for two years or less (the "early RA" group) and individuals who have had RA for more than 2 years and who currently meet the ACR criteria for RA (the "established RA" group).

Inclusion criteria:

• Group 1: early RA : patients with disease lasting 2 years or less, considered by the investigator as an early RA
• Group 2: established RA: patients with disease lasting more than 2 years who meet the ACR criteria for RA

Exclusion criteria:

• Patients with any rheumatic disease different from RA
• Participation in any clinical trial or study in the last 12 months

Patients with early RA and established RA treated in Rheumatology units in a real-world setting