Table 4 Study 2: skewness, kurtosis and response distribution in % of all individual items
Skewness (s.d.=0.16) | Kurtosis (s.d.=0.31) | Never | Hardly ever | A few times | Several times | Many times | A great many times | Almost all the time | |
|---|---|---|---|---|---|---|---|---|---|
On average, during the past week, how often did you feel | |||||||||
CCQ 1. Short of breath at rest? | 0.77 | −0.10 | 41 | 22 | 24 | 10 | 2 | 1 | 0 |
CCQ 2. Short of breath doing physical activities? | 0.54 | −0.15 | 12 | 13 | 35 | 18 | 9 | 6 | 6 |
CCQ 3. Concerned about getting a cold or your breathing getting worse? | 2.14 | 5.60 | 64 | 21 | 10 | 3 | 1 | <1 | <1 |
CCQ 4. Depressed (down) because of your breathing problems? | 2.12 | 6.05 | 62 | 24 | 11 | 2 | 2 | <1 | 0 |
In general, during the past week, how much of the time | |||||||||
CCQ 5. Did you chough? | 0.67 | 0.05 | 14 | 20 | 28 | 21 | 8 | 3 | 7 |
CCQ 6. Did you produce phlegm? | 0.78 | −0.31 | 26 | 21 | 22 | 12 | 8 | 5 | 7 |
Skewness (s.d.=0.16) | Kurtosis (s.d.=0.31) | Not limited at all | Very slightly limited | Slightly limited | Moderately limited | Very limited | Extremely limited | Totally limited/or unable to do | |
On average, during the past week, how limited were you because of your breathing problems | |||||||||
CCQ 7. Strenuous physical activities? | 0.43 | −0.54 | 14 | 21 | 23 | 22 | 10 | 7 | 4 |
CCQ 8. Moderate physical activities? | 0.97 | 0.62 | 30 | 28 | 21 | 13 | 5 | 3 | 2 |
CCQ 9. Daily activities at home? | 2.11 | 5.02 | 57 | 24 | 9 | 6 | <1 | 2 | 1 |
CCQ 10. Social activities? | 2.50 | 7.58 | 62 | 23 | 8 | 3 | 1 | 1 | 1 |
