Table 1 Group features

Subjects (n)

12

62

22

20

Gender (Male/Female)

9 / 3

53 / 9

10 / 12

5 / 15

Age (yr.)

69.11 ± 5.97

68.43 ± 8.57

64.74 ± 11.36

63.33 ± 11.62

Smoking (Former/Never)

5 / 7

43 / 19

12 / 10

5 / 15

Pack-years

20.23 ± 26.07

31.28 ± 20.74

19.25 ± 27.39

20.70 ± 11.67

Smoking cessation (yr.)

7.67 ± 9.07

15.17 ± 8.69

18.56 ± 10.38

9.00 ± 4.58

% FVC

116.20 ± 14.23**

78.71 ± 20.33

82.59 ± 15.98

81.40 ± 25.93

% DLCO

103.10 ± 2.62**

50.41 ± 20.75

56.98 ± 19.40

59.11 ± 27.67

% TLC

112.75 ± 18.31**

79.79 ± 18.69

80.88 ± 17.82

83.61 ± 19.90