Figure 1From: Development, validity and responsiveness of the Clinical COPD Questionnaire CCQ questionnaire Calculation of scores: CCQ total score = (item 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10)/10; Symptom = (item 1 + 2 + 5 + 6)/4; Functional state = (item 7 + 8 + 9 + 10)/4; Mental state = (item 3 + 4)/2Back to article page