What Does ECOG Performance Status Mean?

This page is for patients and caregivers who have seen an ECOG number in a cancer care note. It explains what the scale measures, how it shapes treatment choices, and how to help your team score it accurately.

Somewhere in your oncology note there is a line like "ECOG 1." It is one digit. It often decides more than the digits you were watching, such as tumor size.

ECOG stands for Eastern Cooperative Oncology Group, the research group behind the scale. The scale does not measure your cancer. It rates how well you can do your usual activities.

The SEER Training Modules, published by the National Cancer Institute, give the wording used across oncology:

• 0 — "Fully active, able to carry on all pre-disease performance without restriction"
• 1 — "Restricted in physically strenuous activity but ambulatory and able to carry out work of a light or sedentary nature"
• 2 — "Ambulatory and capable of all selfcare but unable to carry out any work activities. Up and about more than 50% of waking hours"
• 3 — "Capable of only limited selfcare, confined to bed or chair more than 50% of waking hours"
• 4 — "Completely disabled. Cannot carry on any selfcare. Totally confined to bed or chair"
• 5 — "Dead"

In this wording, "ambulatory" means able to walk and move around. "Sedentary" work is work done mostly sitting.

Grade 5 means death. It will not appear in a note about a living patient.

Read grades 2 and 3 again. Both hang on one measurable thing: the share of your waking hours you spend up and about versus in a bed or chair.

That is a concrete measure. If you are awake 14 hours and spend 8 of them sitting in a recliner because of fatigue, you are on the 3 side of that line, whatever anyone assumed at the last visit.

Notice what the wording does not mention: scan results or tumor size. It describes activity and self-care.

Performance status can help guide treatment choices, and it can help forecast the course of illness.

The National Cancer Institute's kidney cancer treatment summary describes patients who respond better to interferon alfa (a type of cytokine therapy) as those who "have nonbulky pulmonary or soft tissue metastases with excellent performance status ratings of 0 or 1, according to the Eastern Cooperative Oncology Group (ECOG) rating scale, and the patients show no weight loss."

On forecasting, NCI's summary of non-small cell lung cancer treatment states that for patients with inoperable disease, "prognosis is adversely affected by poor performance status and weight loss of more than 10%." NCI adds that these patients have been excluded from trials of aggressive combined treatment.

Ask your team how your score affects the options they offer you.

You may also see a percentage instead of a digit. That is the Karnofsky scale, developed in the 1940s. SEER Training Modules list all eleven steps:

• 100%: "normal health"
• 90%: "minor symptoms"
• 80%: "normal activity with some effort"
• 70%: "unable to carry on normal activity but able to care for oneself"
• 60%: "requires occasional help with personal needs"
• 50%: "requires considerable assistance and medical care"
• 40%: "disabled"
• 30%: "severely disabled, in hospital"
• 20%: "very sick, active support needed"
• 10%: "moribund (near death)"
• 0%: death

The practical difference is detail. Karnofsky has eleven steps, and ECOG has six. A real decline can show up as a Karnofsky drop from 80% to 70% while the ECOG number does not move at all. If your team uses both, ask which one their trial or protocol actually requires.

SEER notes this information is not collected by oncology data specialists for cancer surveillance.

A single score is a snapshot. How you feel can change from day to day. It can also change over a treatment cycle. Your own account of your week helps your team score you fairly.

A little prep helps.

Before the visit, count. On a typical day this past week, how many waking hours were you up and moving, and how many were you in a bed or recliner? Note the worst three days and the best three days separately. Note what you stopped doing that you were doing a month ago, in plain terms: stairs, driving, cooking, showering without sitting down.

Then say it out loud. "Last week I was in the recliner about nine of fourteen waking hours on most days." That single sentence is more useful than any adjective, and it is exactly the input the scale is built from.

If your number is being used to rule you out of something, ask whether it can be scored again, and whether anything treatable is affecting it.

• What ECOG number is in my chart today, and what date was it scored?
• What did you base it on?
• Which decision is this number gating: a trial, a drug, a dose, or surgery?
• If it improved by one point, what would open up?
• Is anything treatable affecting it?
• Who re-scores it, and when?

See also Cancer Staging, Pathology Reports, and Getting a Second Opinion.

• https://training.seer.cancer.gov/followup/dataset/ecog-performance-status.html
• https://www.training.seer.cancer.gov/followup/dataset/karnofsky-scale.html
• https://www.cancer.gov/types/kidney/hp/kidney-treatment-pdq
• https://www.cancer.gov/types/lung/hp/non-small-cell-lung-treatment-pdq