Category | Degree | Definition |
0 | None | Not troubled by dyspnoea |
1 | Slight | Troubled by shortness of breath when hurrying on the level or walking up a slight hill |
2 | Moderate | Walks slower than people of the same age on the level because of breathlessness |
3 | Moderately severe | Has to stop because of breathlessness when walking at own pace on the level |
4 | Severe | Stops for breath after walking about 100 yards or a few minutes on the level |
5 | Very severe | Too breathless to leave the house or breathless when dressing or undressing |