The mMRC (modified Medical Research Council) dyspnea scale subjectively classifies the severity of dyspnea in patients with chronic obstructive pulmonary disease (COPD). The higher the degree, the more severe the shortness of breath. This can be used to estimate the risk of a COPD exacerbation. Alternatively, the «COPD Assessment Test™» (CAT) provides a more detailed classification.
|0||Little||Dyspnea only with strenuous exercise|
|1||Mild||Dyspnea when hurrying or walking up a slight hill|
|2||Moderate||Walks slower than people of the same age because of dyspnea or has to stop for breath when walking at own pace|
|3||Many||Stops for breath after walking just under 100 m (100 yards) or after a few minutes|
|4||Very much||Too dyspneic to leave house or breathless when dressing|