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Eastern Cooperative Oncology Group (ECOG) performance status

Eastern Cooperative Oncology Group (ECOG) performance status
Performance status Definition
0 Fully active; no performance restrictions.
1 Strenuous physical activity restricted; fully ambulatory and able to carry out light work.
2 Capable of all self-care but unable to carry out any work activities. Up and about >50% of waking hours.
3 Capable of only limited self-care; confined to bed or chair >50% of waking hours.
4 Completely disabled; cannot carry out any self-care; totally confined to bed or chair.
Adapted from: Oken MM, Creech RH, Tormey DC, et al. Toxicity and response criteria of the Eastern Cooperative Oncology Group. Am J Clin Oncol 1982; 5:649.
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