Table 1

 MRC dyspnoea scale

StatementMRC dyspnoea grade
I only get breathless after strenuous exercise1
I get short of breath when hurrying on the level or on a slight hill2
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 level3
I have to stop for breath after walking 100 yards or after a few minutes on the level4
I am too breathless to leave the house5