Table 2.

Modified Medical Research Council dyspnea scale

mMRC dyspnea scale	Description
0	I only get breathless with strenuous exercise
1	I get short of breath when hurrying on the level or walking up a slight hill
2	I walk slower than people of the same age on the level because of breathlessness or have to stop for breath when walking at my own pace on the level
3	I stop for breath after walking about 100 yards or after a few minutes on the level
4	I am too breathless to leave the house, “or” I am breathless when dressing

mMRC=Modified Medical Research Council