From: Randomised, controlled trial of N-acetylcysteine for treatment of acute exacerbations of chronic obstructive pulmonary disease [ISRCTN21676344]
Likert Scale for Breathlessness
1
Extremely short of breath
2
Very short of breath
3
Quite a bit short of breath
4
Moderate shortness of breath
5
Some shortness of breath
6
A little shortness of breath
7
Not at all short of breath