A Study Comparing 2 Doses Of CP-690,550 Vs. Placebo For The Treatment Of Rheumatoid Arthritis In Patients On Other Background Arthritis Medications

Inclusion Criteria

• •The patient has a diagnosis of Rheumatoid Arthritis based on the American College of Rheumatology (ACR) 1987 Revised Criteria.
• •The patient has active disease as defined by both \>=4 tender or painful joints on motion and \>= 4 joints swollen; and either an erythrocyte sedimentation rate (ESR) \> 28 mm or a C-reactive protein (CRP) concentration \> 7 mg/dL.
• •Patient had an inadequate response to at least one disease modifying antirheumatic drug (traditional or biologic) due to lack of efficacy or toxicity.
• •Patient must remain on at least one background traditional disease modifying antirheumatic drug.
• •No evidence of inadequately treated latent or active infection with Mycobacterium tuberculosis.