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Table 1 The modified Medical Research Council (mMRC) scale

From: The modified Medical Research Council scale for the assessment of dyspnea in daily living in obesity: a pilot study

Grade Description of Breathlessness
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 On level ground, I walk slower than people of the same age because of breathlessness, or I have to stop for breath when walking at my own pace on the level
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