Table 1 Characteristics of the study patients

Mean age (SD), years

61.7 (7.6)

60.8 (10.0)

60.4 (11.4)

58.8 (15.8)

59.8 (14.8)

Gender, Male (%)

Mean height (SD), cm

Mean weight (SD), kg

BMI (SD)

174 (80.2)

166.9 (7.0)

65.9 (9.4)

23.6 (3.1)

172 (80.7)

168.6 (7.3)

67.5 (10.5)

23.7 (3.3)

166 (78.3)

166.2 (8.4)

66.7 (12.9)

24.1 (3.8)

171 (81.4)

171.0 (6.5)

71.4 (13.3)

24.4 (4.5)

166 (79)

164.0 (8.4)

66.2 (11.8)

23.1 (3.6)

Pulmonary function test

 Mean FVC (SD), L

 Mean FVC (SD), % predicted

 Mean FEV₁ (SD), L

 Mean FEV₁ (SD), % predicted

 Mean FEV₁/FVC (SD), ratio

 Mean FEV₁/FVC (SD), % predicted

 Mean IC (SD), L

 Mean IC (SD), % predicted

2.9 (0.8)

83.1 (19.1)

1.7 (0.6)

61.7 (20.2)

56.3 (11.1)

72.7 (14.1)

2.1 (0.6)

79.3 (19.1)

3.6 (0.9)

96.5 (15.7)

2.8 (0.7)

93.3 (14.5)

76.5 (5.7)

97.5 (6.9)

2.4 (0.6)

88.3 (19.2)

3.5 (0.9)

96.3 (17.9)

2.8 (0.7)

96.7 (15.9)

78.0 (6.8)

98.6 (8.0)

2.4 (0.7)

91.9 (17.5)

4.2 (0.9)

99.4 (14.4)

3.3 (0.8)

97.5 (14.3)

80.0 (6.1)

99.5 (6.7)

2.7 (0.7)

92.4 (14.0)

3.6 (0.9)

102.4 (13.4)

2.9 (0.8)

102.5 (12.6)

81.8 (8.8)

99.2 (9.4)

2.3 (0.6)

93.7 (18.2)

 Mean FEF25 (SD), % predicted

34.3 (21.3)

85.6 (21.2)

87.5 (21.4)

94.9 (22.8)

98.3 (19.5)

 Mean FEF50 (SD), % predicted

26.8 (14.9)

71.9 (22.6)

76.2 (28.2)

84.2 (22.8)

86.9 (22.1)

 Mean FEF75 (SD), % predicted

30.2 (14.5)

65.4 (26.7)

69.7 (28.4)

74.9 (27.0)

80.0 (28.1)

GOLD grade, n (%)

 GOLD 1 (FEV₁% predicted > 80)

27 (12.4)

-

-

-

-

 GOLD 2 (50 < FEV₁% predicted > 79)

116 (53.5)

-

-

-

-

 GOLD 3 (30 < FEV₁% predicted > 49)

56 (25.8)

-

-

-

-

 GOLD 4 (FEV₁% predicted < 30)

18 (8.3)

-

-

-

-