Potentially life-threatening condition which is currently not interfering with daily activities eg. Self-care is unaffected and independence is retained. Full-time work would still be possible. Most daily activities can be completed with some difficulty. Symptoms may prevent or lead to avoidance of some daily tasks and simple tasks will usually aggravate symptoms of fatigue.
Symptoms cause significant interference with ability to perform or persist with work-related tasks.
Symptoms may cause prolonged absences from work. Assistance with elements of self-care may be required. Very poor prognosis with only a very limited lifespan. Capacity for self-care is restricted, leading to dependence on others. No residual work capacity.