1: Can walk freely and engage in light physical activities, including general housework or office work, but cannot engage in heavy physical activities.
2 points: I can walk freely and take care of myself, but I have lost my ability to work, and I can get up for at least half a day.
3 points: only partial self-care, staying in bed or in a wheelchair for more than half a day.
4 points: bedridden, unable to take care of themselves.
5 points: death.