Modified Medical Research Council Dyspnoea Scale

0Not troubled with breathlessness, except during strenuous exercise
1Troubled by shortness of breath when hurrying or walking up a slight hill
2Walks slower than people of the same age due to breathlessness or has to stop for breath when walking at own pace on a level surface
3Stops for breath after walking about 100 m or after a few minutes on a level surface
4Too breathless to leave the house or breathless when dressing or undressing