Table 1 Patient Characteristics
From: Comparison of health-related quality of life measures in chronic obstructive pulmonary disease
Characteristic Mean (SD) | Total Sample (n = 120) | GOLD Stage 1 (n = 23) | GOLD Stage 2 (n = 53) | GOLD Stage 3 (n = 27) | GOLD Stage 4 (n = 17) | p-value |
|---|---|---|---|---|---|---|
Age | 71.2 (10.3) | 72.3 (11.5) | 71.7 (11.4) | 70.4 (8.4) | 73.3 (7.9) | 0.82‡ |
Male, n (%) | 118 (98.3) | 23 (100) | 52 (98.1) | 26 (96.3) | 17 (100) | 0.71†|
Race, n (%) |  |  |  |  |  | 0.18†|
   White | 113 (94.2) | 20 (87.0) | 52 (98.1) | 26 (96.3) | 15 (88.2) |  |
   Black | 6 (5.0) | 3 (13.0) | 0 (0.0) | 1 (3.7) | 2 (11.8) |  |
   Other | 1 (0.8) | 0 (0.0) | 1 (1.9) | 0 (0.0) | 0 (0.0) |  |
Smoking status, n (%) |  |  |  |  |  | 0.18†|
   Current | 11 (9.2) | 3 (13.0) | 8 (15.1) | 8 (29.6) | 0 (0.0) |  |
   Past | 90 (75.0) | 17 (73.9) | 39 (73.6) | 18 (66.7) | 16 (94.1) |  |
   Never | 19 (15.8) | 3 (13.0) | 6 (11.3) | 1 (3.7) | 1 (5.9) |  |
BMI (Kg/m2) | 29.1 (5.2) | 30.6 (4.3) | 29.6 (5.1) | 29.2 (5.6) | 25.3 (4.6) | 0.01‡ |
Smoke-years (n = 109) | 33.7 (15.0) | 26.2 (13.0) | 34.6 (15.2) | 39.5 (13.3) | 31.3 (16.1) | 0.02‡ |
Packs/day (n = 105) | 1.57 (0.83) | 1.71 (1.10) | 1.51 (0.88) | 1.44 (0.60) | 1.75 (0.68) | 0.56‡ |
Pack-years (n = 109) | 54.0 (37.9) | 48.9 (46.0) | 54.3 (42.2) | 55.2 (26.2) | 57.0 (32.7) | 0.93‡ |