Table 2 Baseline epidemiologic and clinical characteristics of COPDGene

n

243

196

Age (mean (SD))

62.64 (7.98)

68.81 (8.55)

< 0.001

Female Gender (%)

137 (56.4)

98 (50.0)

0.22

African American Race (%)

68 (28.0)

44 (22.4)

0.23

Current Smoking (%)

88 (36.2)

72 (36.7)

0.99

Pack Years Smoking (mean (SD))

37.82 (21.74)

50.82 (25.98)

< 0.001

FEV1pp (mean (SD))

90.37 (17.52)

63.84 (23.14)

< 0.001

FEV1/FVC Ratio (mean (SD))

0.78 (0.05)

0.56 (0.11)

< 0.001

WBC Count (mean (SD))

6.86 (2.18)

7.23 (1.94)

0.06

neutrophil % (mean (SD))

57.59 (10.16)

61.83 (10.41)

< 0.001

lymphocyte % (mean (SD))

31.41 (9.76)

26.28 (9.09)

< 0.001

monocyte % (mean (SD))

7.73 (2.23)

8.51 (2.92)

0.00

eosinophil % (mean (SD))

2.60 (1.89)

2.69 (1.94)

0.63

miRSeqBatch (%)

0.30

plate1

48 (19.8)

43 (21.9)

plate2

48 (19.8)

36 (18.4)

plate3

44 (18.1)

46 (23.5)

plate4

59 (24.3)

33 (16.8)

plate6

44 (18.1)

38 (19.4)