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	Rheumatoid Factor - Rheumatoid Arthritis: health and medical information about Rheumatoid Arthritis
		Rheumatoid factor is an antibody that is measurable in the blood.
		Rheumatoid factor is commonly used as a blood test for the diagnosis of rheumatoid arthritis.
		Rheumatoid factor is also present in patients with other conditions, including other connective tissue diseases (such as systemic lupus erythematosus), some infectious diseases (such as infectious hepatitis, syphilis, infectious mononucleosis, parasites, and tuberculosis), liver disease, and sarcoidosis.
	www.medicinenet.com /rheumatoid_factor/article.htm (442 words)

	Rheumatoid Factor (RF)
		Rheumatoid factor (RF) blood test measures the amount of the RF antibody present in most people with rheumatoid arthritis.
		A high level of rheumatoid factor can be caused by several autoimmune diseases (including rheumatoid arthritis) and some severe infections.
		Although rheumatoid arthritis is the most common reason for a rheumatoid factor (RF) level greater than 23 and a titer greater than 1 to 20, there are other reasons for a positive test.
	www.webmd.com /hw/arthritis/hw42783.asp (1083 words)

	Rheumatoid Arthritis (RA) Factor
		Rheumatoid factor is present in the serum of a majority of patients with rheumatoid arthritis, depending in part on what method is used.
		The presence of rheumatoid factor, especially in low titer, is far from diagnostic for rheumatoid arthritis.
		Rheumatoid factor can be detected in synovial fluid, pleural fluid, and pericardial fluid, but contributes little more than a positive serum test.
	www.labcorp.com /datasets/labcorp/html/chapter/mono/se024700.htm (220 words)

	Rheumatoid Arthritis
		Most patients suffering from rheumatoid arthritis have antibodies called rheumatoid factors in their bloodstream that are part of the inflammatory process of the disease.
		Rheumatoid factor is also found in cases of chronic infection and in some other types of autoimmune disease.
		High levels of rheumatoid factor are often seen in severe cases of rheumatoid arthritis.
	www.mamashealth.com /rheumatoid_arthritis.asp (626 words)

	Rheumatoid Arthritis Basics — From the Cleveland Clinic
		Rheumatoid arthritis is a type of chronic arthritis that occurs in joints on both sides of the body (such as hands, wrists or knees).
		The exact cause of rheumatoid arthritis is unknown, but it is thought to be due to a combination of genetic, environmental and hormonal factors.
		Therefore, the diagnosis of rheumatoid arthritis is based on a combination of several factors and not just the presence of the rheumatoid factor in the blood.
	www.webmd.com /content/article/78/95599.htm (1112 words)

	Rheumatoid Arthritis Factor
		If you have rheumatoid arthritis, you should be aware of the fact that high levels of rheumatoid factor are associated with a more severe form of rheumatoid arthritis.
		Clearly, the rheumatoid factor is not a definitive test for rheumatoid arthritis because the rheumatoid factor is also seen in the aforementioned other types of autoimmune and infectious diseases.
		Whether you or your child is having the rheumatoid factor test conducted, both children and adults have blood drawn from a vein usually from the back of the hand.
	www.arthritis-pain-cure.com /article_info.php?tPath=3_32&articles_id=31 (693 words)

	UW CME Course (Site not responding. Last check: 2007-10-29)
		Rheumatoid factor production may be a way for the immune system to enlarge immune complexes to make them more easily removed by the spleen and other immune organs.
		Schmerling and Delbanco recently reported on the results of 563 rheumatoid factor determinations in an inpatient unit of a large university hospital.
		Overall, rheumatoid factor had a low (.24) positive predictive value for RA or any rheumatic disease (.34) but a high negative predictive value for RA (.89) and other rheumatic diseases (.85).
	uwcme.org /site/courses/legacy/rheumlab/rafactor.php (569 words)

	Rheumatoid Factor
		Rheumatoid arthritis is one of the most crippling forms of arthritis, affecting about 1% of the adult population worldwide.
		Then researchers identified rheumatoid factor, an antibody to certain proteins that is present in the blood of about 85% of people with rheumatoid arthritis.
		The presence or absence of rheumatoid factor helped physicians distinguish between rheumatoid arthritis, which affects small and large joints in a more or less symmetrical pattern, ankylosing spondylitis (spinal arthritis), and other types of seronegative arthritis, which usually occur in people who have psoriasis, inflammatory bowel disease, or infectious diseases.
	www.lhj.com /lhj/story.jhtml?storyid=/templatedata/lhj/story/data/LL_RheumatoidFactor_03272002.xml (423 words)

	Rheumatoid arthritis - MayoClinic.com
		Rheumatoid arthritis is among the most debilitating of all forms, causing joints to ache and throb and eventually become deformed.
		The exact cause of rheumatoid arthritis is unknown, but it's believed to be the body's immune system attacking the tissue that lines your joints (synovium).
		Rheumatoid arthritis is two to three times more common in women than in men and generally strikes between the ages of 20 and 50.
	www.mayoclinic.com /health/rheumatoid-arthritis/DS00020 (276 words)

	AllRefer Health - Rheumatoid Factor (RF) - Test/Medical Exams/Tests
		Rheumatoid factor is a test that measures the presence and level of rheumatoid factor (RF) in the blood.
		The RF test is used mainly in the diagnosis of rheumatoid arthritis, although the test result can be positive in many other diseases as well as in healthy people.
		RF is an antibody that attaches to a substance in the body called immunoglobulin G (IgG), forming a molecule known as an immune complex.
	health.allrefer.com /health/rheumatoid-factor-info.html (334 words)

	Rheumatoid Arthritis Symptoms - Joint Inflammation - Arthritis & Smoking :: RA.com
		Unlike osteoarthritis, which is caused by the general wear and tear of aging, in rheumatoid arthritis the patient's immune system goes awry, attacking the joints and causing inflammation and stiffness.
		As in previous studies, the researchers determined that current smokers were significantly more likely to have rheumatoid factor than patients who had never smoked, and the number of years of smoking was associated with the amount of rheumatoid factor.
		Smoking might be one of a number of possible factors that influence the severity of rheumatoid arthritis, such as diet, hormonal levels and exposure to environmental pollution," he pointed out.
	www.ra.com /ra/rastore/cgi-bin/ProdSubEV_Cat_200706_NavRoot_301.htm (888 words)

	[No title]
		Rheumatoid arthritis is an autoimmune disease in which the body's defenses attack its own tissues.
		In that time, 126 people developed rheumatoid arthritis and 89 of those people had detectable levels of rheumatoid factor -- an antibody that is often found in the blood years before the onset of rheumatoid arthritis.
		It is possible that some ingredient in coffee that is associated with rheumatoid factor is removed by the filtration, according to the researchers.
	www.mercola.com /2000/aug/6/coffee_arthritis.htm (645 words)

	RemedyFind: patient ratings of Rheumatoid Factor for Rheumatoid Arthritis
		The Rheumatoid Factor (RF) test was developed in the 1940's and detects abnormal immunoglobulin antibodies that may be produced by the lymphocytes in the synovial membranes.
		“Rheumatoid factor (RF) is one item in the classification criteria for rheumatoid arthritis (RA), with a tolerable sensitivity of 69.3% for RA but low specificity against other rheumatic diseases (76.4%).
		“Rheumatoid factor tests were performed in 1988 consecutive new rheumatology outpatients within two months after their first visit to the outpatient clinic of the Department of Rheumatology of Leiden University hospital.
	www.remedyfind.com /rem.asp?ID=10546 (897 words)

	Arthritis Directory: Factor Rheumatoid Arthritis (Site not responding. Last check: 2007-10-29)
		Many people with rheumatoid arthritis have distinctive antibodies in their blood, such as rheumatoid factor, which is present in 70% of people with rheumatoid arthritis.
		Rheumatoid factor is an antibody in the blood, and is...
		Rheumatoid factor (RF) Titers: 1 to 20 or less Units: 23 or less High values Although rheumatoid arthritis is the most common reason for a rheumatoid factor (RF) level greater than 23 and a titer...
	www.arthritisdir.com /Rheumatoid2 (1419 words)

	► Juvenile rheumatoid arthritis
		JRA is generally divided into five broad groups depending on whether a large number of joints are involved or just a few, whether the rheumatoid factor (a blood test) is positive or negative, and whether there is eye involvement or not.
		The cause of juvenile rheumatoid arthritis is unknown.
		Risk factors may be a family history of the disease and recent rubella infection or vaccine.
	www.umm.edu /ency/article/000451.htm (469 words)

	No Bones About It: Drinking Coffee May Increase Arthritis Risk
		Rheumatoid arthritis is inflammation of the lining of the joints in the body and can lead to deformity and disability.
		Indeed, he tells WebMD, other factors associated with an increased risk of rheumatoid arthritis, such as smoking and being overweight, might also be reactions to the stress of feeling tired, which could be an early sign of the disease.
		Jonas adds that rheumatoid factor is a marker, not a cause, of rheumatoid arthritis.
	my.webmd.com /content/article/26/1728_59767.htm (581 words)

	Coffee consumption, rheumatoid factor, and the risk of rheumatoid arthritis -- Heliövaara et al. 59 (8): 631 -- ...
		Coffee consumption, rheumatoid factor, and the risk of rheumatoid arthritis -- Heliövaara et al.
		Rheumatoid arthritis (RA) is a chronic inflammatory disease of unknown cause.
		A number of factors may be associated with coffee consumption and both RF or RA and might therefore confound the analysis.
	ard.bmjjournals.com /cgi/content/full/59/8/631 (2967 words)

	Handout on Health: Rheumatoid Arthritis (Site not responding. Last check: 2007-10-29)
		Rheumatoid arthritis is an inflammatory disease that causes pain, swelling, stiffness, and loss of function in the joints.
		Rheumatoid arthritis also can cause more generalized bone loss that may lead to osteoporosis (fragile bones that are prone to fracture).
		Researchers studying rheumatoid arthritis now believe that it begins to damage bones during the first year or two that a person has the disease, one reason why early diagnosis and treatment are so important.
	www.niams.nih.gov /hi/topics/arthritis/rahandout.htm (6571 words)

	Disease Center: Rheumatoid Arthritis - Causes
		Rheumatoid factor is an antibody that is directed to regulate normal antibodies made by the body.
		It is important to note that not all people with RA have an elevated rheumatoid factor and not all people with an elevated rheumatoid factor have RA.
		Rheumatoid arthritis is not contagious, although it is possible that a germ to which almost everyone is exposed may cause an abnormal reaction from the immune system in people who already carry a susceptibility for RA.
	www.arthritis.org /conditions/DiseaseCenter/RA/ra_causes.asp (499 words)

	Adult Health Advisor 2005.2: Rheumatoid Factor Test
		This is a test to determine if you have rheumatoid factor, a kind of antibody, in your blood.
		Rheumatoid arthritis is a disease that causes pain, stiffness, swelling of the joints, and sometimes joint damage.
		In this situation other tests can help determine that the problem really is rheumatoid arthritis, even with a negative rheumatoid factor.
	www.med.umich.edu /1libr/aha/aha_raquanti_crs.htm (428 words)

	Rheumatoid factor - eMJA: Subsidised access to TNFa inhibitors: is the rationale for (Site not responding. Last check: 2007-10-29)
		Rheumatoid factor is an antibody frequently detected in the serum of patients Measurement of rheumatoid factor provides supportive evidence for the
		Rheumatoid factor (RF) blood test measures the amount of the RF antibody If rheumatoid factor (RF) is present, the latex beads clump (agglutinate).
		Rheumatoid factor (RF) Designed to detect and measure the level of an antibody that acts against the blood component gamma globulin, this test is often
	factor.allinfosites.com /q/factor-rheumatoid-factor.htm (538 words)

	RDL - Education Center
		It appears to be useful diagnostically in differentiating Seropositive RA from the arthritis of Hepatitis C with Rheumatoid Factor (RF) positivity.
		Importantly, the absence of rheumatoid factor positivity in the majority of cases of early RA is a major void diagnostically.
		IgM rheumatoid factor was detected in 37% of seropositive RA 3.3 years before onset of clinical symptoms.
	www.rdlinc.com /educationcenter.html (2748 words)

	Coffee may be linked to rheumatoid arthritis
		The association between coffee drinking and the presence of a hallmark indicator for the development of rheumatoid arthritis-rheumatoid factor-was studied in a cross sectional survey of almost 7000 people, and in almost 19000 people, who were monitored for around 15 years.
		The number of cups of coffee drunk daily was strongly associated with rheumatoid factor in the survey study.
		The authors conclude that some as yet unidentified ingredient in coffee, particularly in coffee that is not filtered, may trigger the production of rheumatoid factor, which can precede the development of arthritis by years, and consequently lead to an increased risk of developing rheumatoid arthritis.
	www.eurekalert.org /pub_releases/2000-07/UNKN-Cmbl-2507100.php (240 words)

	Rheumatoid factor definition - Rheumatoid Arthritis: health and medical information about Rheumatoid Arthritis
		Rheumatoid factor: Rheumatoid factor is an antibody that is measurable in the blood.
		It is commonly used as a blood test for the diagnosis of rheumatoid arthritis.
		Rheumatoid factor is present in about 80% of adults (but a much lower proportion of children) with rheumatoid arthritis.
	www.medterms.com /script/main/art.asp?articlekey=5356 (230 words)

	Rheumatoid Factor Test
		Examination of the blood to determine the presence of rheumatoid factors (IgG or IgM molecules which react with altered IgG).
		Useful in the confirmation of the diagnosis of rheumatoid arthritis when clinical examination is not conclusive.
		Rheumatoid factor testing is medically indicated for those patients whose clinical diagnosis is highly suspicious for rheumatoid arthritis and the blood test is needed for confirmation.
	www.cignamedicare.com /partb/lmrp/tn/cms_fu/97-19-01.htm (796 words)

	227 - RHEUMATOID FACTOR TEST (Site not responding. Last check: 2007-10-29)
		This test is useful in the confirmation of the diagnosis of rheumatoid arthritis when clinical examination is inconclusive.
		A rheumatoid factor is not specific for rheumatoid arthritis.
		The Rheumatoid Factor (RF) blood test would be medically indicated after the clinical examination proves unable to distinguish between Rheumatoid Arthritis and the following conditions.
	www.gamedicare.com /Policies/227.htm (764 words)

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