Table 1 Baseline characteristics of subjects: individuals with chronic obstructive pulmonary disease (COPD), acute exacerbation of COPD (AECOPD) and controls

Age (years)

62.6 (3.5)

66.5 (4.9)

0.376

42.1 (range 29–63)

Sex (n)

0.900

 Male

4(33)

3(27)

13 (56)

 Female

12(67)

8(73)

10 (44)

Race (n)

0.080

 White

16 (100)

9 (82)

22 (96)

 Black

0

2 (18)

0

 Asian

0

0

1 (4)

Current Smokers (n)

4 (25.0)

3 (27.0)

0.900

n/s

Total pack years (mean)

42.929 (9.3)

46.8 (26.4)

0.751

n/s

Forced Vital Capacity (FVC) (L)

2.29 (0.8)

1.96 (0.8)

0.355

n/s

Forced Expiratory Volume in one second (FEV₁) (L)

1.46 (0.7)

0.88 (0.4)

0.029

n/s

FEV₁/FVC (%)

51.5 (12.7)

40.0 (17.92)

0.094

n/s

Diffusing Capacity (DLCO) (ml/min/Hg)

15.87 (5.6); n = 8

9.66 (4.8); n = 6

0.050

n/s

Eosinophils (cells/µl)

190.7 (98.6)

*

n/a

n/s