CL Item
Asymptomatic (Fully active, able to carry on all predisease activities without restriction) (0)
CL Item
Symptomatic but completely ambulatory (Restricted in physically strenuous activity but ambulatory and able to carry out work of a light or sedentary nature. For example, light housework, office work) (1)
CL Item
Symptomatic, <50% in bed during the day (Ambulatory and capable of all self care but unable to carry out any work activities. Up and about more than 50% of waking hours) (2)
CL Item
Symptomatic, >50% in bed, but not bedbound (Capable of only limited self-care, confined to bed or chair 50% or more of waking hours) (3)
CL Item
Bedbound (Completely disabled. Cannot carry on any self-care. Totally confined to bed or chair) (4)