The short answer
Karnofsky Performance Status is a report or oncology term that needs context from the full diagnosis, test method, symptoms, and treatment goal.
What Does Karnofsky Performance Status Mean? is a planning topic, not a diagnosis or treatment instruction by itself.
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The full explanation.
The short answer
Karnofsky Performance Status is often shortened to KPS. It is a scale that describes how well someone can carry out daily activities. It also describes how well they can care for themselves. The scale runs from 100 down to 0, in steps of 10. A higher score means someone is more independent. It also means they function more normally. A lower score means someone needs more help. It can also mean they are more seriously ill. A score of 0 means death.
Where you may see it
You may see a Karnofsky score in oncology notes. It also shows up in radiation oncology records, and transplant discussions. Clinical trials often list it as part of their eligibility criteria too. Doctors and nurses assign the score based on what they observe. They also weigh what you report about your daily function. It is not a lab test or a scan.
What the number actually means
The scale spans a wide range of function. At the top, 100 means normal activity with no complaints. It means no signs of disease at all. A score of 90 means normal activity with only minor symptoms. In the middle, scores in the 60s and 70s describe a different picture. This is someone who can generally care for themselves. But they cannot keep up normal work or activity, or they need occasional help. Lower down, the 30s and 40s describe someone who is disabled. They need considerable care at this level. Scores of 20 or below describe someone who is very ill. They need active medical support. Doctors use the number as shorthand. It stands in for a much longer conversation about what a person can and cannot do.
What it can tell your team
KPS helps guide several real decisions. It can shape how intensive a treatment plan is. Some treatments are harder on the body than others. Doctors often reserve those for people who can tolerate them. KPS can also determine trial eligibility. Many clinical trials set a minimum KPS score for enrollment. It can track change over time too. A falling score between visits is worth discussing. It often reflects the illness itself, not just the treatment.
What it cannot tell by itself
A KPS score does not diagnose anything. It also does not predict exactly how long someone will live, by itself. It is one factor among several in any prognosis discussion. It is not a standalone answer. The score is somewhat subjective too. Two clinicians can watch the same person on the same day. They can still score it a little differently, since judgment plays a role. If a score seems to have changed sharply, ask what specifically changed. Do not treat the number alone as the full picture.
Is this urgent?
The score itself is not an emergency. But a sudden drop in KPS between visits is worth flagging quickly. It can signal a change in the illness. It can also mean a new complication, or a side effect that needs attention.
Questions to ask
Ask what your current KPS score is, and what it is based on. Ask whether your score affects which treatments or trials are being offered to you. Ask what would need to change for your score to go up. Ask what support could help — physical therapy, nutrition, or other services. Ask how your team will track this over time.
Sources
Words to know
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Common questions
Does this page tell me what treatment to choose?
No. It explains the topic in plain language so you can ask better questions. Your care team applies it to your diagnosis, test results, and goals.
What should I bring to the visit?
Bring the report, medicine list, recent test results, and a written list of questions. Ask what result or decision is still pending.
When is this more urgent?
Use the urgent instructions from your care team for severe, fast-changing, or treatment-specific warning symptoms.
Questions to ask your doctor
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Your next step
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Sources last checked: 2026-07-21 what this meansLast updated: 2026-08-05Next planned review: 2027-07-21
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How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes. We do not employ clinicians and do not intend to — our work is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source checked — This page was written with AI assistance and checked line by line against the sources listed on it. That confirms the sources support what the page says. It is not a medical review, and it does not confirm the page is complete or right for your situation.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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