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.