MRC dyspnoea scale,”1 – Not troubled by breathlessness except on strenuous exercise2 – Short of breath when hurrying or walking up a slight hill3 – Walks slower than contemparies on level ground because of breathlessness, or has to stop for breath when walking at own pace4 – Stops for breath after walking about 100 m or after a few minutes on level ground5 – Too breathless to leave the house

MRC dyspnoea scale,”1 – Not troubled by breathlessness except on strenuous exercise2 – Short of breath when hurrying or walking up a slight hill3 – Walks slower than contemparies on level ground because of breathlessness, or has to stop for breath when walking at own pace4 – Stops for breath after walking about 100 m or after a few minutes on level ground5 – Too breathless to leave the house

or breathless when dressing or undressing”