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Table 3 Test re-test reliability of the CCQ taken with a 5 days difference among patients with COPD as indicated through the Inter Correlation Coefficient (ICC) (n = 16)

From: Smoking cessation can improve quality of life among COPD patients: Validation of the clinical COPD questionnaire into Greek

  

95% C.I

 

ICC

Lower Limit

Upper Limit

CCQ total score before - CCQ total score after

0.990

0.971

0.996

On average, during the past 24 hours, how often did you feel:

Short breath at rest?

0.977

0.935

0.992

Short of breath doing physical activities?

0.979

0.941

0.993

Concerned about getting a cold or your breathing getting worse?

0.920

0.788

0.971

Depressed (down) because of your breathing problems?

0.967

0.908

0.988

In general, during the past 24 hours, how much of the time:

Did you cough?

0.990

0.972

0.997

Did you produce phlegm?

0.939

0.836

0.978

On average, during the past 24 hours, how limited were you in these activities because of your breathing problems:

Strenuous physical activities

0.976

0.933

0.992

Moderate physical activities

0.983

0.952

0.994

Daily activities at home

0.948

0.859

0.982

Social activities

0.976

0.932

0.991