Karnofsky Performance Status
Describes functional capacity in cancer patients from 0 to 100%.
When to use
Functional assessment of adults with cancer before and during treatment.
Pearls and pitfalls
- The scale ranges from 100% to 0% in 10% steps, describing activity and self care.
- Seventy percent or more indicates ability for normal or near normal activity.
- The scale is subjective and should be applied by the same observer when possible.
- It does not replace assessment of quality of life, symptoms or goals of care.
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Formula
Choose the level matching current activity, self care and need for assistance.
Evidence
Historical oncology performance scale, with reliability and application guidelines reviewed in a later study.
References
- Schag CC, Heinrich RL, Ganz PA. Karnofsky performance status revisited: reliability, validity, and guidelines. J Clin Oncol. 1984;2(3):187-193. doi:10.1200/JCO.1984.2.3.187
Frequently asked questions
What is Karnofsky Performance Status?
Describes functional capacity in cancer patients from 0 to 100%. Functional assessment of adults with cancer before and during treatment.
How is the result calculated?
Choose the level matching current activity, self care and need for assistance.
How should the result be interpreted?
Historical oncology performance scale, with reliability and application guidelines reviewed in a later study.
What are the sources?
Schag CC, Heinrich RL, Ganz PA. Karnofsky performance status revisited: reliability, validity, and guidelines. J Clin Oncol. 1984;2(3):187-193.