MAGENT

ECOG performance status: what each grade from 0 to 4 means

ECOG performance status is a 0 to 4 grade of how well a person manages everyday activity, from 0 (fully active) to 4 (completely disabled). The grades come from the Eastern Cooperative Oncology Group, published by Oken and colleagues in 1982. Magent's calculator takes the grade a clinician has chosen and returns it with a fixed label.

Not a medical device. Not a diagnosis or dosing recommendation.

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What is ECOG performance status?

Performance status is a short way of recording how much a person can do for themselves. The ECOG scale, also written ECOG PS, uses five grades. Each grade describes a level of activity, from carrying on as normal through to being confined to a bed or chair.

The grade is chosen by a person who knows the patient. There is nothing to measure or add up. Magent's calculator checks that the grade is a whole number from 0 to 4 and returns the grade, a maximum of 4 and a label for that grade.

This page explains the grades. It doesn't say what a grade means for a particular person.

The ECOG grades

grade  label              description (as in the calculator's input notes)
0      fully_active       fully active
1      restricted         restricted in strenuous activity, ambulatory, able to do light work
2      ambulatory         ambulatory and capable of all self-care, unable to work, up >50% of waking hours
3      limited_selfcare   capable of limited self-care, in bed or chair >50% of waking hours
4      disabled           completely disabled, no self-care, totally confined to bed or chair

Exact expression the calculator uses:

ECOG performance status = caller-assigned integer 0-4 (Oken 1982); max 4; grade 5 (dead) is not scored

Input

InputMeaningValues accepted
ecogECOG performance status grade chosen by the clinician0, 1, 2, 3, 4

Any other value returns an invalid_ecog_ps error.

How the calculation works

  1. Take the grade the clinician chose.
  2. Check it is a whole number from 0 to 4.
  3. Return the grade as the score, the maximum of 4 and the label for that grade.

The score and the grade are the same number. The calculator doesn't change it.

Units

The grade has no units. It is a category, so a grade of 4 isn't "twice" a grade of 2.

Worked examples

These use Magent's own expected values for the calculator.

Example 1: grade 0

  1. The clinician records ECOG 0.
  2. Score 0 of 4, label fully_active.

Example 2: grade 2

  1. The clinician records ECOG 2.
  2. Score 2 of 4, label ambulatory.

Example 3: grade 4

  1. The clinician records ECOG 4.
  2. Score 4 of 4, label disabled.

History of the ECOG scale

The calculator cites Oken and colleagues, American Journal of Clinical Oncology, 1982, a paper setting out toxicity and response criteria for the Eastern Cooperative Oncology Group. The performance status grades the calculator uses come from that paper. The paper also lists grade 5 for death, which the calculator doesn't score.

When it's used

The grade is used to record a person's level of activity at a point in time, so it can be compared later or shared in a standard form.

Where it's used

ECOG performance status is most familiar from cancer care and cancer research, where it is written in notes and study records.

Who uses it

A clinician who knows the patient chooses the grade. The calculator returns the grade with its label in a fixed format.

Limits of the calculation

  • The calculator doesn't observe the patient or choose the grade.
  • It scores grades 0 to 4. Grade 5 (death) isn't scored.
  • It isn't the Karnofsky scale and doesn't convert between the two.
  • It doesn't say whether a person is suitable for any course of care, and this page doesn't say what to do with a grade.

Clinical decisions belong to a qualified clinician who knows the patient.

  • Karnofsky performance status is a separate scale with its own values. The calculator doesn't convert Karnofsky to ECOG.
  • International Prognostic Index is a five-factor index used in lymphoma. ECOG is a single grade chosen by a clinician.

Glossary

  • ECOG: Eastern Cooperative Oncology Group.
  • Performance status: a grade of how much a person can do in daily life.
  • Ambulatory: able to walk and move about.
  • Self-care: looking after oneself, such as washing and dressing.

Common mistakes

  • Entering grade 5. The calculator accepts 0 to 4.
  • Entering a Karnofsky value. The input is the ECOG grade, not a Karnofsky percentage.
  • Entering a half grade. Grades are whole numbers.
  • Reading the label as more than a tag. The label is a short name for the grade, not a new result.

Source

Oken MM, et al. Toxicity and response criteria of the Eastern Cooperative Oncology Group. Am J Clin Oncol. 1982;5(6):649-655. DOI: 10.1097/00000421-198212000-00014. PMID: 7165009

Frequently asked questions

What does ECOG 0 mean?

Fully active. It is the first grade on the scale.

What is the difference between ECOG 1 and ECOG 2?

Grade 1 is restricted in strenuous activity but able to do light work. Grade 2 is capable of all self-care but unable to work, and up more than 50% of waking hours.

Why is there no grade 5 in the calculator?

Grade 5 means death. The calculator scores the activity grades 0 to 4.

Does the calculator assign the grade?

No. A clinician chooses the grade and the calculator returns it with its label.

Is ECOG the same as Karnofsky?

No. They are different scales, and the calculator doesn't convert one to the other.