Skip to main content

Table 1 Characteristics of the study population (n = 119)

From: Development, validity and responsiveness of the Clinical COPD Questionnaire

    

COPD

 
 

Healthy (ex)smokers

At Risk (Stage 0)

Mild (Stage I)

Moderate (Stage IIA)

Moderate (Stage IIB)

Severe (Stage III)

N

44

18

15

20

16

6

Males (%)

48

33

60

70

81

100

Age, yr

51 (45–71)

53 (42–61)

54 (48–66)

57 (46–73)

66 (49–74)

59 (53–69)

Pack yr

24 (4–66)

29 (2–67)

31 (20–77)

35 (15–77)

36 (10–85)

34 (12–45)

Current smoking(%)

89

100

100

85

75

83

FEV1 (%pred)

101 (62–128)

105 (82–132)

93 (81–116)

69 (51–75)

41 (30–49)

24 (22–28)

  1. Healthy (ex) smokers; normal spirometry, no chronic symptoms (cough, sputum production). COPD classification of COPD by severity according to the GOLD guidelines; Stage 0: normal spirometry, chronic symptoms (cough, sputum production); Stage I: FEV1/FVC < 70%, FEV1 ≥ 80 % predicted, with or without chronic symptoms (cough, sputum production, dyspnea); Stage IIA: FEV1/FVC < 70%, 50% ≥ FEV1 < 80 % predicted; Stage IIB: FEV1/FVC < 70%, 30% ≥ FEV1 < 50 % predicted; Stage III: FEV1/FVC < 70%, FEV1 < 30 % predicted or FEV1 < 50% predicted plus respiratory failure or clinical signs of right heart failure.
Back to article page

Health and Quality of Life Outcomes

ISSN: 1477-7525

Contact us