Modified Medical Research Council dyspnea scale
| DYSPNEA GRADE | DESCRIPTION |
|---|---|
| 0 | Breathless only with strenuous activity or exercise |
| 1 | Troubled by shortness of breath when hurrying on level ground or walking up a slight hill |
| 2 | Walks slower than people the same age on level ground owing to breathlessness OR has to stop for breath while walking at his or her own pace on level ground |
| 3 | Stops for breath after walking about 100 m or after walking for a few minutes on level ground |
| 4 | Too breathless to leave the house OR breathless when dressing or undressing |
Adapted from Br Med J 1959;2:257–6615 with permission from the BMJ Publishing Group.