Consortium for the Longitudinal Evaluation of African Americans With Early Rheumatoid Arthritis (The CLEAR Registry) (CLEAR)

Consortium for the Longitudinal Evaluation of African-Americans With Early Rheumatoid Arthritis (CLEAR) Registry

Rheumatoid arthritis (RA) is a long-term autoimmune disease that is characterized by pain, stiffness, inflammation, swelling, and sometimes destruction of joints. RA usually requires lifelong treatment, including medications, physical therapy, exercise, education, and possibly surgery, but the course and severity of the disease can differ significantly from person to person. The purpose of this study is to identify genetic and other factors that determine the severity of RA in African Americans.

Study Overview

• Status: Completed
• Conditions: Rheumatoid Arthritis

Detailed Description

RA is a chronic condition that causes inflammation of the joints and surrounding tissues. Symptoms may include pain, stiffness, swelling, and sometimes destruction of joints. RA can affect any joint, but it is most common in the wrist and fingers. More women than men get RA, and it often starts between the ages of 25 and 55. The course and severity of the disease can differ significantly from person to person. Some people with RA may have the disease for only a short time, or their symptoms might come and go, but the severe form of RA can last a lifetime. The purpose of this study is to identify genetic and other factors that determine the severity of RA in African Americans.

Participants in this study will include African Americans with RA and healthy African Americans with RA. There are two arms: (1) longitudinal; and (2) cross-sectional. The longitudinal arm has completed enrollment and is still in the follow-up phase. This consists of visits at baseline (less than 2 years disease duration; 3 years disease duration; and 5 years disease duration).

For the cross-sectional arm, there will be one study visit for all participants, which will last approximately 1 to 2 hours for participants without RA (controls) and 2 to 3 hours for participants with RA. For all participants, this visit will include a medical history review; questionnaires regarding health, functional ability, family, education, and work history; and blood and urine collection. For participants with RA, this visit will also include examination of the joints for pain and swelling, X-rays of the hands and feet, and a physical examination.

The urine samples will be stored for future analyses of protein and chemical markers. The blood samples will be used in three different ways: (1) isolation of DNA; (2) isolation of serum and plasma; and (3) isolation of RNA. Part of the blood samples will be used by the investigators to identify genes or proteins that may predispose people to develop RA or that may influence disease outcome or treatment response. If participants agree, their blood cells will be put through a procedure called immortalization, which will provide researchers with sufficient DNA for all future studies associated with this study and for other related projects. If the immortalization process fails, participants may be asked for an additional blood sample with which to repeat the procedure. However, participants will not be provided with any information on their genes.

• Study Type: Observational
• Enrollment (Actual): 1613

Contacts and Locations

Study Locations

• United States
  • Alabama
    • Birmingham, Alabama, United States, 35294
      • University of Alabama at Birmingham

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 19 years and older (ADULT, OLDER_ADULT)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

African Americans with and without RA

Description

Inclusion Criteria for Group 1 Participants:

• Rheumatoid arthritis
• Self-declared as African American

Exclusion Criteria for Group 1 Participants:

• Lupus

Study Plan

How is the study designed?

Number of groups / cohorts

2

Cohorts and Interventions

Group / Cohort
African Americans with RA; 1063 participants with RA
African-Americans without RA; 550 participants without RA

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Radiographic severity of rheumatoid arthritis in African Americans	Measured at any point during the duration of disease

Collaborators and Investigators

• Sponsor: National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
• Collaborators: University of Alabama at Birmingham
• Investigators: Principal Investigator: S. Louis Bridges, Jr, MD, PhD, University of Alabama at Birmingham

Study record dates

Study Major Dates

• Study Start: September 1, 2000
• Primary Completion (Actual): December 1, 2011
• Study Completion (Actual): March 1, 2012

Study Registration Dates

• First Submitted: December 29, 2008
• First Submitted That Met QC Criteria: December 29, 2008
• First Posted (Estimate): December 30, 2008

Study Record Updates

• Last Update Posted (Estimate): December 2, 2014
• Last Update Submitted That Met QC Criteria: December 1, 2014
• Last Verified: December 1, 2014

More Information

Terms related to this study

• Keywords: African American
• Additional Relevant MeSH Terms: Immune System Diseases; Autoimmune Diseases; Joint Diseases; Musculoskeletal Diseases; Rheumatic Diseases; Connective Tissue Diseases; Arthritis; Arthritis, Rheumatoid
• Other Study ID Numbers: N01 AR002278; N01AR62278-6-0-1 (U.S. NIH Grant/Contract)