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.
The next step depends on diagnosis, symptoms, goals, prior results, and what is still pending.
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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 and care for themselves. This page explains what the score means and how care teams use it. The scale runs from 100 down to 0, in steps of 10. A higher score means someone is more independent and functions more normally. A lower score means someone needs more help and may be more seriously ill. A score of 0 means death. The scale was introduced in 1949.
Where you may see it
You may see a Karnofsky score in oncology notes. Clinical trials also use it to group people by how well they function. A clinician assigns the score using judgment, not a lab test or scan. It reflects physical function only. It is not a full measure of quality of life, which also includes emotional and social well-being.
What the number actually means
The scale is often grouped into three bands:
- 100 to 80: able to work, with normal activity. Scores of 90 and 80 allow for minor symptoms.
- 70 to 50: unable to work, but able to handle self-care, with varying amounts of help.
- 40 to 0: needs much more care, ranging from severe disability to the end of life.
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 is used in a few ways:
- Trial grouping. Clinical trials use it to sort people by functional status.
- Change over time. A falling score between visits is worth discussing. Ask what changed.
What it cannot tell by itself
A KPS score does not diagnose anything. It is linked with survival in studies, but it cannot predict exactly how long one person will live. It is one factor among several. The score is also somewhat subjective. Studies show only moderate to good agreement between raters, 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 may point to a new complication or a side effect that needs attention. If you suddenly become much weaker or have severe symptoms, call your care team right away. For trouble breathing or chest pain, call 911.
Questions to ask
- What is my current KPS score, and what is it based on?
- Does my score affect which treatments or trials are being offered to me?
- What would need to change for my score to go up?
- What support could help, such as physical therapy, nutrition, or other services?
- How will you track this over time?
Sources
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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Plain-language explanation of the published sources cited on this page. AI-assisted, source-checked, not clinician-reviewed.
Sources last checked: 2026-10-02 what this meansLast updated: 2026-10-02Next planned review: 2027-07-21
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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, and this 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 then compared with the sources listed on it, looking for statements those sources do not back up. That check is not a sentence-by-sentence record and can miss errors. 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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