The MMRC Dyspnea Scale includes the following categories:
Grade 0: I only get breathless with strenuous exercise. Grade 1: I get short of breath when hurrying on level ground or walking up a slight hill. Grade 2: I walk slower than people of the same age on level ground because of breathlessness, or I have to stop for breath when walking at my own pace on level ground. Grade 3: I stop for breath after walking about 100 yards or after a few minutes on level ground. Grade 4: I am too breathless to leave the house or I am breathless when dressing or undressing.
