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Rheumatoid arthritis (RA) is a long-term autoimmune disorder that primarily affects joints. [1] It typically results in warm, swollen, and painful joints. [1] Pain and stiffness often worsen following rest. [1] Most commonly, the wrist and hands are involved, with the same joints typically involved on both sides of the body. [1]
Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...
[10] [5] [6] The most common forms are osteoarthritis (most commonly seen in weightbearing joints) and rheumatoid arthritis. [7] Osteoarthritis usually occurs as an individual ages and often affects the hips, knees, shoulders, and fingers. [7] [11] Rheumatoid arthritis is an autoimmune disorder that often affects the hands and feet. [7]
High levels of rheumatoid factor (in general, above 20 IU/mL, 1:40, or over the 95th percentile; there is some variation among labs) occur in rheumatoid arthritis (present in 80%) and Sjögren's syndrome (present in 50-70% of primary forms of disease). [11] The higher the level of RF the greater the probability of destructive articular disease.
A complete blood count (CBC), also known as a full blood count (FBC), is a set of medical laboratory tests that provide information about the cells in a person's blood.The CBC indicates the counts of white blood cells, red blood cells and platelets, the concentration of hemoglobin, and the hematocrit (the volume percentage of red blood cells).
Palindromic rheumatism is a disease of unknown cause. It has been suggested that it is an abortive form of rheumatoid arthritis (RA), since anti-cyclic citrullinated peptide antibodies (anti-CCP) and antikeratin antibodies (AKA) are present in a high proportion of patients, as is the case in rheumatoid arthritis. [6]
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Women are 2–3 times more susceptible than men. The prevalence of rheumatoid lung disease in patients with RA depends on the method used for diagnosis: chest X rays (5%), high resolution CT scans (10–40%). [6] A study showed 582 patients with RA and 603 subjects without RA were followed for a mean of 16.4 and 19.3 years, respectively.