What is Performance Status for Cancer
ECOG, Karnofsky, Lansky, Zubrod, and WHO PS
Performance status (PS) is a simple measure of a person’s health performance and well being based on guidelines generally followed by physicians. The doctor records a number to indicate how capable a person is of performing activities of daily living.
This number is recorded as a way to quantify how a person feels and how active a person is. PS is used in clinical oncology research as one way of measuring how effective a treatment is and assessing how the patients’ disease is progressing.
PS scales have been published in a variety of ways such as Zubrod, Karnofsky, ECOG, WHO, and Lansky. Comparison of these scales is relatively similar.
Use the comparison table criteria below to help you determine a performance status.
ECOG / WHO / Zubrod
Symptoms but ambulatory where strenuous physical activity is restricted
In bed less than 50 percent of the time. Capable of all self-care
In bed more than 50 percent of the time. Capable of only limited self-care.
Completely disabled and bedridden.
*Oken MM, Creech RH, Tormey DC, et al (1982). "Toxicity and response criteria of the Eastern Cooperative Oncology Group". Am. J. Clin. Oncol. 5 (6): 649–55
Consult your health care professional if you have any questions.
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