The mMRC breathlessness scale ranges from grade 0 to 4. It is very similar to the original version and is now widely used in studies. It should be noted that the MRC clearly states on its website that it is unable to give permission for use of any modified version of the scale (including therefore, the mMRC scale). Use of the MRC questionnaire is free but should be acknowledged.
|MRC Dyspnoea Scale|
|Grade||Degree of breathlessness related to activity|
|1||Not troubled by breathless except on strenuous exercise|
|2||Short of breath when hurrying on a level or when walking up a slight hill|
|3||Walks slower than most people on the level, stops after a mile or so, or stops after 15 minutes walking at own pace|
|4||Stops for breath after walking 100 yards, or after a few minutes on level ground|
|5||Too breathless to leave the house, or breathless when dressing/undressing|