TABLE 1.

The Medical Research Council dyspnea scale

Grade	Description
1	Not troubled by breathlessness except with strenuous exercise
2	Troubled by shortness of breath when hurrying on the level or walking up a slight hill
3	Walks slower than people of the same age on the level because of breathlessness or has to stop for breath when walking at own pace on the level
4	Stops for breath after walking about 100 yards (90 m) or after a few minutes on the level
5	Too breathless to leave the house or breathless when dressing or undressing