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FIB-4 and APRI: what scores from routine blood tests say about scarring | CION Cancer Clinics
FIB-4 and APRI are scores worked out from routine blood tests: your liver enzymes, your platelet count and, for FIB-4, your age. They estimate how likely it is that your liver has serious scarring. A low score makes it unlikely; a higher one means a closer look. This page explains what goes into each score, what happens next, and where the scores mislead. At CION Cancer Clinics, our specialists help you understand your own risk and plan regular liver checks that fit it.
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Medically reviewed by Dr. Naresh GunduConsultant Medical Oncologist · MBBS, DNB (Internal Medicine), DM (Medical Oncology, AIIMS) · last reviewed October 2026, next review due October 2027
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The short answer
What do FIB-4 and APRI scores tell you about your liver?
FIB-4 and APRI are simple scores worked out from blood tests you have probably already had. They estimate how likely it is that your liver has serious scarring, called advanced fibrosis or cirrhosis. A low score makes serious scarring unlikely. A high score means you need a closer look.
Why doctors use them
Most people with fatty liver, hepatitis B or hepatitis C never develop serious scarring. Doctors need a cheap way to find the few who might, without sending everyone for a scan or a biopsy. These scores do that first sort. They cost nothing extra, because they use numbers already on your liver function test and blood count.
What they are not
They are not a test for cancer. They say nothing about a spot, a lump or a nodule on a scan. They are also not a diagnosis of cirrhosis on their own. A score in the middle or at the top usually leads to a FibroScan, which measures liver stiffness directly.
A score sorts people into "probably fine", "not sure" and "look closer". It never settles the question by itself.The ingredients
Which blood tests go into the scores?
Both scores use the same small handful of numbers. Seeing why each one is there makes the result easier to understand.
AST, also called SGOT
An enzyme that leaks out of damaged liver cells. As scarring advances, AST tends to rise more than ALT. Both scores use it.
ALT, also called SGPT
Another liver enzyme. FIB-4 compares AST with ALT, because the balance between the two shifts as scarring builds up. APRI does not use ALT.
Platelet count
Platelets are the blood cells that help clotting. When the liver is badly scarred, blood backs up into the spleen, which grows and traps platelets. A falling count is one of the quieter signs of cirrhosis. Our page on enlarged spleen and low platelets explains why.
Your age
FIB-4 includes age, because scarring builds up over time. This is also its weakness: the score drifts up in older people even with a healthy liver.
The scores do not use
- Your weight or waist size
- Any scan result
- Bilirubin or albumin
Not sure whether this applies to you?
Ask an oncologistWhat happens next
What does my doctor do with the score?
The score is calculated
Your doctor, or the laboratory report itself, puts your AST, ALT, platelets and age into the formula. Many reports now print FIB-4 automatically.
A low score: reassurance
Below the lower cut-off, serious scarring is unlikely. You usually carry on treating the cause, such as weight, alcohol or the virus, and repeat the blood tests in future.
A middle score: a second test
In the grey zone, the score cannot decide. The usual next step is a FibroScan or a similar stiffness test, which CION arranges through diagnostic partners.
A high score: a specialist
Above the upper cut-off, serious scarring is likely. You should see a hepatologist, and if cirrhosis is confirmed, ask about liver cancer surveillance.
Side by side
How are FIB-4 and APRI different?
FIB-4
APRI
Uses age, AST, ALT and platelets
Uses AST and platelets only
The usual first check in fatty liver
Used most in hepatitis C, especially where scans are scarce
Good at ruling serious scarring out
Also better at ruling out than ruling in
Less reliable in young adults and in older people
Depends on which upper limit of normal the laboratory uses
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Commonly believed
Four things people believe about these scores, and what is true
"My liver tests are normal, so my score must be fine."
Not always. A person with cirrhosis can have normal or only slightly raised enzymes. A low platelet count with normal enzymes can still push the score up, which is exactly why the score exists.
"A high score means I have cirrhosis."
It means cirrhosis is more likely and needs checking. A recent hepatitis flare, heavy drinking or a blood disorder can raise the score without serious scarring. A stiffness test or specialist review decides.
"If my score is high, I probably have liver cancer."
The scores measure scarring, not cancer. Most people with a high score do not have cancer. What a high score can mean is that regular surveillance scans would be sensible.
"Once the score is low, I never need it again."
Scarring can build slowly while the cause carries on. Doctors usually repeat the score from time to time, especially with diabetes, fatty liver or untreated hepatitis.
Being straight with you
What this page cannot tell you
It cannot tell you what your own score means. The cut-offs that separate low, middle and high depend on the cause of your liver disease, your age and the laboratory. We have not printed them here, because a number copied from a chart without that context misleads more people than it helps. Your physician or hepatologist will read it with you.
Who these scores do not suit
They are unreliable during a sudden hepatitis, after heavy drinking, and in anyone whose platelets are low for another reason, such as a blood disorder or chemotherapy. If your enzymes have risen during cancer treatment, see our page on raised SGPT and SGOT during chemotherapy instead. And if you already know you have cirrhosis, the score adds little.
They do not apply to cancer in the liver
If you have a tumour in the liver, whether it started there or spread from the bowel, breast or elsewhere, these scores do not stage it or guide treatment. The team uses scans, a biopsy where needed and measures of liver function instead.
Not sure whether your score needs follow-up? Call the helpline with your latest report, and someone will tell you honestly what the next step is.Questions we are asked
Common questions about FIB-4 and APRI
Can I calculate my own FIB-4 score?
You can, with free online calculators and the numbers on your report. The harder part is reading it. The right cut-off depends on your age and the cause of your liver disease, so take the result to your doctor rather than deciding alone whether to worry.
Do I need to fast for these blood tests?
Usually not for the liver enzymes and blood count themselves, although your doctor may order other tests at the same time that do need fasting. Avoid alcohol and heavy exercise in the days before, as both can raise AST and nudge the score up.
Which is better, FIB-4 or APRI?
Neither is better in every case. FIB-4 is the usual first check for fatty liver and is widely used in hepatitis B and C. APRI is simpler and has been used a great deal in hepatitis C programmes. Doctors often look at both and then confirm with a stiffness test.
My score is high but my FibroScan is normal. Which is right?
The FibroScan usually carries more weight, because it measures the liver directly. Your doctor will also check whether something else, like a low platelet count from another cause, pushed the score up. If the two still disagree, a repeat test or a specialist review may be suggested.
Can my score go down?
Yes. When the cause is treated, for example hepatitis C cleared with modern tablets, hepatitis B controlled with antiviral medicine, alcohol stopped or weight lost in fatty liver, the enzymes often settle and the score falls. Platelets recover more slowly, if at all, once cirrhosis is established.
Is FIB-4 reliable for thin Indians with fatty liver?
It is still a reasonable first check. Fatty liver is common in Indians at lower weights, and the score does not use weight at all. The same limits apply: it rules out better than it rules in. See our page on fatty liver in thin people.
Does a high score mean I need a liver biopsy?
Rarely as the next step. A stiffness test such as FibroScan usually comes first. A biopsy is kept for cases where tests disagree or another liver disease is suspected. Our page on fibrosis stages explains what the biopsy would measure.
Who should I see about my score?
Your family physician can calculate and explain it, and a hepatologist manages serious scarring. If you are already a cancer patient, or worried about liver cancer, a CION doctor can review your reports with your family. Call the helpline and someone will point you to the right clinic.
Your Specialists
Meet CION's liver cancer specialists. Bring your scan reports and liver blood tests.
Our medical and surgical oncologists plan liver cancer care together, weighing the tumour and how well your liver works before choosing surgery, a liver-directed procedure or medicines.
Medical Oncologist
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Medical Oncologist
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
Surgical Oncologist
Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
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Sources
- MedlinePlus — Liver Function Tests
- Liver UK (formerly British Liver Trust) — Metabolic dysfunction-associated steatotic liver disease (MASLD)
- NIDDK — Cirrhosis - NIDDK
- AASLD — Practice Guidelines
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
FibroScan and liver stiffness numbersThe usual next test after a middle or high scoreFibrosis stages: F0 to F4 explainedWhat the scarring stages actually meanWho with fatty liver actually needs monitoringWhere the score fits in fatty liver careWhat is my cancer risk with cirrhosis?If the score leads to a cirrhosis diagnosis
Talk to us
Worried about a high FIB-4 or APRI score?
Share your blood reports and a doctor will explain what your score means and whether a stiffness test or surveillance makes sense. We can help arrange the next step if you need one. One helpline serves every CION centre.