Table 3 Lung function at baseline

 No

n(%)

0 (0.0)

-----

-----

 Yes, prior to the visit

n(%)

75 (65.8)

13 (48.2)

62 (71.3)

0.027^C

 Yes, during the visit

n(%)

39 (34.2)

14 (51.8)

25 (28.7)

 FVC (ml) - Mean (S.D.)

2485.4 (844.0)

2546.7 (788.7)

2466.4 (864)

0.668^T

 FVC (%) - Mean (S.D.)

71.3 (19.4)

75.7 (21.7)

69.9 (18.6)

0.142^U

 FEV1 (ml) - Mean (S.D.)

1239.7 (521.8)

1456.3 (544.9)

1172.5 (498.7)

0.013^T

 FEV1 (%) - Mean (S.D.)

48.7 (17.4)

56.7 (17.8)

46.2 (16.6)

0.007^U

 FEV1/FVC (%) - Mean (S.D.)

50.8 (13.2)

57.3 (10)

48.8 (13.5)

0.004^U

 Missing

n

0

0

0

 Stage I: Mild (80 ≤ FEV1% ≤ 100)

n(%)

6 (5.3)

2 (7.4)

4 (4.6)

0.074^F

 Stage II: Moderate (50 ≤ FEV1% ≤ 79)

n(%)

42 (36.8)

15 (55.6)

27 (31.0)

 Stage III: Severe (30 ≤ FEV1% ≤ 49)

n(%)

50 (43.9)

7 (25.9)

43 (49.4)

 Stage IV: Very severe (FEV1% < 30)

n(%)

16 (14.0)

3 (11.1)

13 (14.9)

 Missing

n

0

0

0

 X (D.E.)

93.9 (3.0)

95.0 (2.7)

93.5 (3.0)

0.025^U

 O₂ saturation >90 %

98 (86.0)

25 (92.6)

73 (83.9)

0.351^F

 Missing

n

0

0

0

  < 30

n(%)

39 (34.2)

6 (22.2)

33 (37.9)

0.323^C

 30–60

n(%)

36 (31.6)

10 (37.0)

26 (29.9)

  > 60

n(%)

39 (34.2)

11 (40.7)

28 (32.2)

 Missing

n

0

0

0

 No

n(%)

56 (49.1)

18 (66.7)

38 (43.7)

0.037^C

 Yes

n(%)

58 (50.9)

9 (33.3)

49 (56.3)

 Missing

n

0

0

0

 Quartile 1: 0–2 points

n(%)

28 (24.6)

12 (44.4)

16 (18.4)

0.011^C

 Quartile 2: 3–4 points

n(%)

44 (38.6)

11 (40.7)

33 (37.9)

 Quartile 3: 5–6 points

n(%)

31 (27.2)

4 (14.8)

27 (31.0)

 Quartile 4: 7–10 points

n(%)

11 (9.6)

0 (0.0)

11 (12.6)

 Missing

n

0

0

0