RA Factor Test Price in Pakistan: Rs 960 at Chughtai Lab

A rheumatoid factor test checks a sample of your blood for rheumatoid factor, a protein made by the immune system. MedlinePlus explains that your immune system normally makes antibodies to attack germs, while rheumatoid factor instead attacks healthy cells, usually immunoglobulin G which is one of the commonest antibodies made to fight germs. At Chughtai Lab an RA factor test costs Rs 960, reduced from Rs 1,200.

A Positive RA Factor Is Not a Diagnosis

This is where most of the worry around this test comes from, so it belongs at the top.

MedlinePlus states that many people have small amounts of RF in their blood and are healthy, and that even high amounts are not always a sign of a health condition. It is equally clear that the results of an RF test alone cannot diagnose a condition.

It then gives the two facts that matter most, and they cut both ways.

• People with rheumatoid arthritis can have little or no rheumatoid factor. A negative result does not rule RA out
• People without rheumatoid arthritis can have a lot of RF in their blood. A positive result does not confirm it

MedlinePlus notes that generally the higher your RF level, the more likely it is that you have a condition linked to rheumatoid factors, and that your provider may refer you to a rheumatologist for more testing if the results are inconclusive.

So this test narrows the question. It does not answer it.

RA Factor Does Not Diagnose Osteoarthritis

Worth saying plainly, because these two conditions are confused constantly and the confusion sends people for the wrong test.

MedlinePlus states that an RF test is not used to diagnose osteoarthritis. It explains that although rheumatoid arthritis and osteoarthritis both affect the joints, they are very different diseases, and that osteoarthritis is not an autoimmune disease and does not involve rheumatoid factor.

Osteoarthritis is the wear and tear arthritis that comes with age and use, and it is far commoner. If your knee pain started gradually in later life and is worse after activity, RF is unlikely to be the test that helps. Rheumatoid arthritis behaves differently, as the symptom list below shows.

The Symptom Pattern That Suggests RA

MedlinePlus lists the symptoms that prompt an RF test, and one detail in it is the most useful clue on this page.

• Joint pain or stiffness when moving, usually worse in the morning or after inactivity
• RA usually affects both joints. MedlinePlus puts it directly: if one of your hands or knees is affected, so is the other
• Joint tenderness, redness and warmth
• Joint swelling that makes activities hard, such as combing your hair, buttoning your clothes or bending your knees
• Fatigue, fever and a loss of appetite
• Hard bumps under the skin near the joints, called rheumatoid nodules

Morning stiffness that eases as the day goes on, affecting the same joints on both sides, is the pattern worth taking to a doctor. Osteoarthritis tends to be the reverse, worse with use through the day.

MedlinePlus also notes that people with rheumatoid arthritis often develop anaemia, so if you have anaemia your provider may want to give you an RF test. A [CBC](/labs/tests/cbc-test-price) is commonly ordered alongside.

High RF Is Not Only About Arthritis

This is the part that surprises people, and two of the causes matter a great deal in Pakistan.

MedlinePlus lists the other conditions that can raise RF.

Hepatitis C and tuberculosis are both common here and both are treatable. A raised RF in someone without joint symptoms may point your doctor towards [hepatitis C testing](/labs/tests/hepatitis-c-test-price) or [TB testing](/labs/tests/tb-test-price) rather than towards a rheumatologist.

MedlinePlus adds that it is rare to get tested for high RF levels if you do not have symptoms of any of these conditions. This is not a screening test for healthy people.

RA Factor or Anti-CCP

Both appear on prescriptions for joint pain and they are different tests.

A doctor assessing possible rheumatoid arthritis will commonly order RF alongside anti-CCP and inflammation markers such as [ESR](/labs/tests/esr-test-price) and [CRP](/labs/tests/crp-test-price). Book what the prescription lists rather than choosing one.

Reading Your Result

MedlinePlus explains the two formats you may receive.

A negative or normal result means you have little or no rheumatoid factor in your blood. MedlinePlus is explicit that this does not rule out rheumatoid arthritis or another health problem, and that if you have RA symptoms with a normal RF your provider may order more tests.

A positive or abnormal result means a higher level was found. Your provider will consider other test results, your symptoms and your medical history to work out whether you have rheumatoid arthritis or another autoimmune disease, a chronic infection, or certain cancers.

MedlinePlus notes that sometimes, rather than simply positive or negative, your report will state how much RF was in the sample along with a normal range for that laboratory. Read your figure against that range rather than one from a website.

How to Prepare

MedlinePlus states you do not need any special preparations for an RF test. No fasting is required.

Bring a clear account of your joint symptoms: which joints, whether both sides are affected, whether stiffness is worse in the morning, and how long it has been going on. That history does more to guide the diagnosis than the number itself.

What Happens During the Test

A trained phlebotomist takes a small blood sample from a vein in your arm using a small needle. MedlinePlus notes it usually takes less than five minutes and that you may feel a little sting as the needle goes in or out. There is very little risk beyond slight pain or bruising, which settles quickly. In Lahore the sample can be collected at your home.

اردو میں

آر اے فیکٹر ایک پروٹین ہے جو مدافعتی نظام بناتا ہے۔ عام طور پر مدافعتی نظام جراثیم پر حملہ کرنے کے لیے اینٹی باڈیز بناتا ہے، لیکن آر اے فیکٹر جراثیم کے بجائے جسم کے اپنے صحت مند خلیوں پر حملہ کرتا ہے۔

سب سے ضروری بات یہ ہے۔ رپورٹ پازیٹو آنے کا مطلب یہ نہیں کہ آپ کو گٹھیا ہے۔ عالمی طبی معلومات کے مطابق بہت سے صحت مند لوگوں کے خون میں بھی یہ پروٹین تھوڑی مقدار میں موجود ہوتا ہے، اور زیادہ مقدار بھی ہمیشہ بیماری کی علامت نہیں ہوتی۔ اکیلا یہ ٹیسٹ کسی بیماری کی تشخیص نہیں کر سکتا۔

دونوں طرف کی بات یاد رکھیں۔ گٹھیا کے کچھ مریضوں میں یہ پروٹین بالکل نہیں ہوتا، اور بہت سے ایسے لوگوں میں زیادہ ہوتا ہے جنہیں گٹھیا نہیں ہوتا۔

ایک اور اہم بات۔ یہ ٹیسٹ ہڈیوں کے گھساؤ والے جوڑوں کے درد یعنی اوسٹیو آرتھرائٹس کی تشخیص کے لیے استعمال نہیں ہوتا۔ وہ خودکار مدافعتی بیماری نہیں ہے اور اس میں آر اے فیکٹر کا کوئی کردار نہیں۔

گٹھیا کی علامات کی خاص پہچان یہ ہے۔ صبح اٹھتے وقت یا دیر تک بیٹھے رہنے کے بعد جوڑوں میں اکڑن زیادہ ہوتی ہے، اور عام طور پر دونوں طرف کے جوڑ متاثر ہوتے ہیں۔ اگر ایک ہاتھ یا گھٹنا متاثر ہو تو دوسرا بھی۔ اس کے علاوہ جوڑوں میں سوجن، گرمی اور سرخی، تھکن، بخار اور بھوک کی کمی بھی ہو سکتی ہے۔

آر اے فیکٹر بڑھنے کی وجہ صرف گٹھیا نہیں ہوتی۔ ہیپاٹائٹس سی اور ٹی بی جیسے پرانے انفیکشن بھی اسے بڑھا دیتے ہیں، اور دونوں پاکستان میں عام ہیں اور دونوں کا علاج موجود ہے۔ اس لیے رپورٹ ڈاکٹر کو دکھائیں اور خود نتیجہ نہ نکالیں۔

ٹیسٹ سے پہلے کوئی خاص تیاری نہیں چاہیے۔ ڈاکٹر کو بتائیں کہ کون سے جوڑ متاثر ہیں، دونوں طرف ہیں یا ایک طرف، اور اکڑن صبح زیادہ ہوتی ہے یا شام۔ یہ تفصیل رپورٹ سے زیادہ کام آتی ہے۔ چغتائی لیب میں اس ٹیسٹ کی قیمت نو سو ساٹھ روپے ہے اور لاہور میں گھر سے نمونہ لینے کی سہولت موجود ہے۔

Final Thoughts

RA factor is a useful test and a frequently over-read one. It cannot diagnose rheumatoid arthritis by itself, it cannot rule it out, and it has nothing to do with the osteoarthritis that accounts for most joint pain in older adults. What makes it worth doing is the company it keeps: anti-CCP, ESR, CRP and a CBC, read together by a doctor who has heard which joints hurt and when. And if RF is high with no joint symptoms at all, hepatitis C and TB are worth ruling out before anything else.