|Fully active, able to carry on all predisease performance without restriction
|Restricted in physically strenous activity, but ambulatory and able to carry out work of a light and sedentary nature (e.g. light house work, office work)
|Ambularoty and capable od all self-care but unable to carry out any work activities. Up and about more than 50% of waking hours
|Capable of only limited self-care, confined to bed or chair more than 50% of waking hours
|Completely disabled. Cannot carry on any self-care. Totally confined to bed or chair.