Table 1

Modified Medical Research Council dyspnoea scale

CategoryDegreeDefinition
0NoneNot troubled by dyspnoea
1SlightTroubled by shortness of breath when hurrying on the level or walking up a slight hill
2ModerateWalks slower than people of the same age on the level because of breathlessness
3Moderately severeHas to stop because of breathlessness when walking at own pace on the level
4SevereStops for breath after walking about 100 yards or a few minutes on the level
5Very severeToo breathless to leave the house or breathless when dressing or undressing
  • Modified from 15, 16