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Table 2 Demographic characteristics across COPD risk groups A-D and GOLD grades I-IV

From: Differences in classification of COPD patients into risk groups A-D: a cross-sectional study

Variable

 

Age [yrs]

Male

Number of comorbidities

Current smokers

Classification

N

Mean ± SD

N (%)

Mean ± SD

N (%)

CAT - Severity grades

87

    

A

29

70.2 ± 8.5

15 (51.7)

2.1 ± 2.6

13 (44.8)

B

40

65.6 ± 10.6

21 (52.5)

2.5 ± 1.9

22 (55.0)

C + D

18

66.2 ± 8.4

15 (83.3)

1.9 ± 1.6

6 (33.3)

mMRC – Severity grades

79

    

A

42

66.2 ± 9.4

21 (50.0)

2.1 ± 2.2

23 (54.8)

B

20

69.9 ± 12.0

11 (55.0)

2.6 ± 1.7

10 (50.0)

C + D

17

66.1 ± 8.6

14 (82.4)

1.8 ± 1.6

6 (35.3)

CAT - Exacerbations

87

    

A

30

70.4 ± 8.4

16 (53.3)

2.1 ± 2.6

13 (43.3)

B

48

64.7 ± 10.0

30 (62.5)

2.4 ± 1.8

24 (50.0)

C + D

9

70.7 ± 7.9

5 (55.6)

2.0 ± 1.9

4 (44.4)

mMRC - Exacerbations

79

    

A

48

65.8 ± 9.2

26 (54.2)

2.1 ± 2.1

20 (41.7)

B

22

68.5 ± 12.1

15 (68.2)

2.4 ± 1.6

9 (40.9)

C + D

9

70.7 ± 7.9

5 (55.6)

2.0 ± 1.9

4 (44.4)

GOLD grades

87

    

I

23

67.5 ± 10.2

9 (39.1)

2.1 ± 2.5

11 (47.8)

II

46

67.6 ± 10.0

27 (58.7)

2.5 ± 2.0

24 (52.2)

III

12

66.2 ± 9.2

9 (75.0)

1.5 ± 1.4

6 (50.0)

IV

6

66.2 ± 7.1

6 (100.0)

2.7 ± 1.9

0 (0.0)

  1. CAT, COPD assessment test; COPD, chronic obstructive pulmonary disease; GOLD, Global Initiative for Chronic Obstructive Lung Disease; mMRC, modified Medical Research Council; SD, standard deviation.