Characterize Patients With Moderately Active Rheumatoid Arthritis (RA)

The Test Group will be patients with rheumatoid arthritis, newly starting therapy with
etanercept (Enbrel). Inclusion criteria for the exposed cohort subjects are:

- Patients aged 18 years and over at the time of diagnosis;

- Patients from the BSRBR with moderate RA as defined by a DAS28 (>3.2 and ≤5.1);

- Patients who have given informed consent for long term follow-up and access to all
medical records;

- Patients initiating (i.e. at leats one treatment) treatment with etanercept (Enbrel)
for RA.

The Control Group:

- Patients aged 18 years and over a the time of diagnosis;

- Patients from the BSRBR with moderate RA as defined by a DAS28 (>3.2 and ≤5.1);

- Patients who have given informed consent for long term follow-up and access to all
medical records; Patients are receiving at least one traditional DMARD and have never
been prescribed a biologic agent;