The traditional Medical Research Council Dyspnoea Scale (MRCD)13 and the extended version (eMRCD)12
| Limitation due to breathlessness | MRCD | eMRCD |
| Breathless only with strenuous exercise | 1 | |
| Breathless when hurrying on the level or walking up a slight hill | 2 | |
| Walks slower than peers, or stops when walking on the flat at own pace | 3 | |
| Stops after walking 100 m, or for a few minutes, on the level | 4 | |
| Too breathless to leave the house | 5 | |
| & independent in washing and/or dressing | 5a | |
| & dependent in washing and dressing | 5b | |