MRC breathlessness scale

• Grade 1:

  • not troubled by breathlessness except on strenuous exercise

  
• Grade 2:

  • shortness of breath when hurrying on the level or walking up a slight hill

  
• Grade 3:

  • walks slower than most people, stops after a mile or so, or stops after 15 minutes walking at own pace

  
• Grade 4:

  • stops for breath after walking about 100 yards or after a few minutes on level ground

  
• Grade 5:

  • too breathless to leave the house, or breathless when undressing