Eastern Cooperative Oncology Group (ECOG) performance status
0Fully active, able to carry out all pre-disease performance without restriction
1Physically strenuous activity is restricted, but is ambulatory and able to carry out work of a light or sedentary nature, e.g., light housework, office work
2Ambulatory and capable of all selfcare but unable to carry out any work activities. Up and about for >50% of waking hours
3Capable of only limited selfcare, confined to bed or chair for >50% of waking hours
4Completely disabled. Cannot carry out any selfcare. Totally confined to bed or chair