Table 1

Patient Characteristics

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


based on Chi-square or ANOVA

Pickard et al. Health and Quality of Life Outcomes 2011 9:26   doi:10.1186/1477-7525-9-26

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