Skip to main content

Table 1 Patient demographic and clinical characteristics (Total N = 670)

From: Measuring health-related quality of life in chronic obstructive pulmonary disease: properties of the EQ-5D-5L and PROMIS-43 short form

Characteristic, n (%)

No. of missing

Total sample

GOLD 1 (Mild; n = 102)

GOLD 2 (Moderate; n = 353)

GOLD 3 (Severe; n = 165)

GOLD 4 (Very severe; n = 50)

p-value (comparing GOLD 1,2 vs 3,4)

Age, mean (SD)

0

68.5 (10.4)

72.1 (11.3)

68.3 (10.5)

67.7 (9.7)

65.1 (7.4)

0.02§

Male

0

387 (57.8)

69 (67.7)

203 (57.5)

88 (53.3)

27 (54.0)

0.12

Race

0

     

<.0001

 Caucasian

 

524 (78.2)

91 (89.2)

290 (82.2)

114 (69.3)

29 (58.0)

 

 African American

 

121 (18.1)

11 (10.8)

52 (14.7)

40 (24.1)

18 (36.0)

 

 Native American*

 

20 (3.0)

0 (0)

8 (2.3)

9 (5.4)

3 (6.0)

 

 Asian/multiracial/other

 

5 (0.8)

0 (0)

3 (0.9)

2 (1.2)

0 (0)

 

BMI (Kg/m2), mean (SD)

4

29.1 (7.6)

29.1 (6.2)

29.4 (7.0)

29.4 (8.9)

26.0 (9.3)

0.26§

Main activity

0

     

0.30

 Employed (incl.self-employment)

 

106 (15.8)

18 (17.7)

61 (17.3)

20 (12.1)

7 (14.0)

 

 Retired

 

451 (67.3)

69 (67.7)

234 (66.3)

114 (69.1)

34 (68.0)

 

 Keeping house/student/seeking work

 

61 (9.1)

10 (9.9)

31 (8.8)

17 (10.3)

3 (6.0)

 

 Disabled – on disability

 

41 (6.1)

5 (4.9)

22 (6.2)

8 (4.9)

6 (12.0)

 

 Other

 

11 (1.6)

0 (0)

5 (1.4)

6 (3.6)

0 (0)

 

Education

0

     

0.04

 Some high school or less

 

92 (13.7)

12 (11.8)

48 (13.6)

27 (16.4)

5 (10.0)

 

 High school graduate or GED

 

178 (26.6)

23 (22.6)

97 (27.5)

44 (26.7)

14 (28.0)

 

 Vocational college or some college

 

256 (38.2)

36 (35.3)

126 (35.7)

70 (42.4)

24 (48.0)

 

 College degree

 

86 (12.8)

14 (13.7)

53 (15.0)

16 (9.7)

3 (6.0)

 

 Professional or graduate degree

 

58 (8.7)

17 (16.7)

29 (8.2)

8 (4.9)

4 (8.0)

 

Household total gross yearly income

77

     

0.002

 Less than $30,000

 

275 (46.4)

30 (36.1)

137 (43.5)

86 (57.3)

22 (48.9)

 

 $30,001 to $50,000

 

164 (27.7)

25 (30.1)

94 (29.8)

33 (22.0)

12 (26.7)

 

 $50,001 to $75,000

 

82 (13.8)

14 (16.9)

39 (12.4)

23 (15.3)

6 (13.3)

 

 Over $75,000

 

72 (12.1)

14 (16.9)

45 (14.3)

8 (5.3)

5 (11.1)

 

Smoking status

0

     

0.09

 Current smoker

 

193 (28.8)

21 (20.6)

109 (30.9)

49 (29.7)

14 (28.0)

 

 Past smoker

 

412 (61.5)

64 (62.8)

209 (59.2)

104 (63.0)

35 (70.0)

 

 Never smoker

 

65 (9.7)

17 (16.7)

35 (9.9)

12 (7.3)

1 (2.0)

 

Smoke pack-years, mean (SD)

2

44.2 (31.2)

36.3 (30.3)

44.2 (30.9)

48.0 (31.5)

48.2 (31.8)

0.03§

Comorbid medical conditions

       

 Coronary heart disease**

0

220 (32.8)

42 (41.2)

119 (33.7)

51 (30.9)

8 (1.2)

0.04

 Hypertension

0

416 (62.1)

57 (55.9)

221 (62.6)

110 (66.7)

28 (56.0)

0.44

 Diabetes

0

154 (23.0)

20 (19.6)

85 (24.1)

39 (23.6)

10 (20.0)

0.93

 Stroke or cerebrovascular disease

0

96 (14.3)

13 (12.8)

53 (15.0)

25 (15.2)

5 (10.0)

0.85

 Cancer history

0

174 (26.0)

22 (21.6)

96 (27.2)

44 (26.7)

12 (24.0)

0.98

 Dementia

0

10 (1.5)

2 (2.0)

7 (2.0)

1 (0.6)

0 (0)

0.18

 Depression

0

229 (34.2)

34 (33.3)

131 (37.1)

52 (31.5)

12 (24.0)

0.10

  1. GED = general education diploma.
  2. Based on Chi-square, or Fisher’s exact test or §t-test.
  3. *Inclde American Indian, Alaskan Native, Native Hawaiian, Pacific Islander, Native American plus other.
  4. **Include angina, coronary artery disease, coronary artery revascularization, or myocardial infarction diagnosed by doctor.