Appendix C. WHO performance status classification

The WHO performance status classification categorises patients as:

  • 0: able to carry out all normal activity without restriction

  • 1: restricted in strenuous activity but ambulatory and able to carry out light work

  • 2: ambulatory and capable of all self-care but unable to carry out any work activities; up and about more than 50% of waking hours

  • 3: symptomatic and in a chair or in bed for greater than 50% of the day but not bedridden

  • 4: completely disabled; cannot carry out any self-care; totally confined to bed or chair.