What Is Rheumatoid Factor (RF Test)
The Rheumatoid Factor (RF) Test is a blood test that helps diagnose rheumatoid arthritis (RA) and to distinguish it from other types of arthritis. The RF test measures the level of a specific type of antibody called rheumatoid factor, which is present in some people’s blood with RA.
RA is an autoimmune disorder, which means the immune system mistakenly attacks healthy cells and tissues in the body. In RA, the immune system attacks the synovium, the lining of the joints, causing inflammation, pain, and stiffness. The presence of rheumatoid factor in the blood indicates that the immune system is attacking the joints. If your doctor has recommended taking this test, we urge you to book your appointment today.
About RA Factor Test
Do you need clarification on whether the blood test for arthritis is ideal for you? Please read this section to understand why you should take the RF test and how to prepare for it.
Why Do I Need RA Testing?
The RF test is not specific only for rheumatoid arthritis. It can also help diagnose other conditions, such as:
- Sjogren Syndrome
- Lupus
- Chronic infections like hepatitis C and lymphoma
- Autoimmune diseases
This is also because of the following symptoms in both men and women:
- Extreme pain in the joints
- Tiredness or fatigue
- Mild fevers that come and go
- Tenderness or swelling of the joints
- Loss of appetite
- Dry eyes or mouth
- Lumps in the body
It is important to note that not everyone with RA will have a positive rheumatoid factor test, and some people without RA may have a positive test. For this reason, the RF test is not used alone to diagnose RA but in combination with other tests and clinical information.
How To Prepare For RA Factor Blood Test?
There is no special preparation required for the RF test. It is a simple blood test that requires drawing a blood sample from the vein in your arm. Before the test, be wary of the following factors:
- Do not fast unless prescribed by your healthcare professional.
- Drink adequate water before arriving at the diagnostic center
- Avoid consuming alcohol or smoking.
- If you have medications, consult your healthcare provider to see if you can take those before checking your Rheumatoid Factor (RF) levels.
What Happens During Rheumatoid Factor Blood Testing?
Are you visiting your nearest diagnostic center to get an RF test? If yes, your healthcare professional will take the following steps to draw the blood sample:
- Your healthcare provider will wrap a thin pipe around your arm and cleanse the target area with rubbing alcohol.
- The expert will check for the vein in your arm and ask you to clench your fists tightly.
- Your healthcare provider will draw a blood sample from your vein using a syringe and collect it in a vial/test tube, removing the injection from your skin.
- They will seal the target area with a bandage to avoid bleeding and send your blood sample to the laboratory for testing.
Finding RA Factor Test
Should you call for an RF test at home or get it done at your nearest clinic? Read more to find out what suits your comfort.
Can I Take The RA Blood Test At Home?
Yes, you can. You can contact your nearest diagnostic center to call a healthcare professional and get the RF test done from the comfort of your home.
How Much Does The RA Factor Test Cost?
The RF test price depends on the diagnostic center you choose to get it done. In most cases, if you have insurance coverage, it covers the expense of the test, else you can purchase a new plan without putting a dent in your pocket.
Test Results Interpretation
Received your RF test results but wondering if you have a rheumatoid factor of the normal range? Check out this section to understand how to go about your RF diagnoses with your healthcare professional.
What Do RH Factor Test Results Mean?
Your RA blood test can have a unit within the normal range or higher or lower due to any underlying medical conditions. Compare your test results against the chart mentioned below:
| Rheumatoid Factor normal range | 10-20 IU/ml |
| Rheumatoid Factor low range | <10 IU/ml |
| Rheumatoid Factor high range | >20 IU/ml |
What Is RA Factor Normal Range?
Your rheumatoid factor blood results should show a range of 10-20 IU/ml. Anything above or beyond is considered to be a high or low RF.
What Medical Conditions Can Cause High Rheumatoid Levels?
If you have a higher than normal Rheumatoid Factor (RF) Test result, it can be indicative of the following medical conditions:
- Sjogren Syndrome
- Lupus
- Chronic infections like hepatitis C and lymphoma
- Autoimmune diseases
What Medical Conditions Can Cause Low Rheumatoid Levels?
Lower than normal rheumatoid factor blood test results can cause weakness in the joints, accompanied by frequent cramping, dry skin or mouth, and lumps over the body. However, you can correct this through prescription drugs recommended by your healthcare professional.
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FAQs Around Rheumatoid Arthritis (RA Factor) Test
Is rheumatoid arthritis dangerous?
Rheumatoid arthritis is an autoimmune disease that can cause inflammation in the joints and surrounding tissues. It can lead to joint damage and deformity if left untreated. It can also cause inflammation in other organs in the body, which can lead to serious complications. Hence, it should be considered to be dangerous and should be diagnosed immediately.
What is considered a positive rheumatoid factor?
If your rheumatoid factor levels are above 20 IU/ml, that can be considered a positive result.
What is considered a high rheumatoid factor level?
Medical experts consider rheumatoid factor levels above 20 IU/ml as high as it leads to health issues like rheumatoid arthritis, lupus, Sjogren’s Syndrome, and more.
Is rheumatoid factor 10 normal?
A rheumatoid factor blood test score of 10 is normal. Anything below that falls shorter than the normal range.
What are the 3 symptoms of rheumatoid arthritis?
Rheumatoid Arthritis can trigger in men and women due to extreme pain and tenderness in the joints, stiffness, and weakness.
