Table 1 Clinical characteristics and lung function parameters of study subjects

Age (years)

46 ± 11

47 ± 8

54 ± 9

Smoking (pack-years)

0

34 ± 6

45 ± 17

FEV₁ (% pred)

106 ± 12*

101 ± 9*

68 ± 11

FVC (% pred)

107 ± 10*

108 ± 11*

85 ± 15

FEV₁/FVC (%)

85 ± 6*

79 ± 6*

64 ± 5

FEF_25–75 (% pred)

94 ± 31*

79 ± 20*

32 ± 10

RV (% pred)

99 ± 13

92 ± 9

85 ± 25

TLC (% pred)

97 ± 8

96 ± 8

89 ± 12

FRC (% pred)

98 ± 16

95 ± 14

95 ± 15

DLCO (% pred)

91 ± 9

85 ± 10

89 ± 11

PaO₂ (mm Hg)

-

96 ± 11

81 ± 14