Table 1.

Questions on shortness of breath, cough, and phlegm in the clinical COPD questionnaire (CCQ)

On average, during the past week, how often did you feel:

1. Short of breath at rest?

2. Short of breath during physical activities?

In general, during the past week, how much of the time:

5. Did you cough?

6. Did you produce phlegm?

One score (0–6) for each question

0 = Never

1 = Hardly ever

2 = A few times

3 = Several times

4 = Many times

5 = A great many times

6 = Almost all the time

Abbreviation: COPD, chronic obstructive pulmonary disease.