Table 1 |
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Characteristics and lung function data in COPD patients, smoking controls (S) and non-smoking controls (NS). |
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COPD |
S |
NS |
|
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|
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N (n) |
20 |
13 |
14 |
|
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Males (n) |
11 |
6 |
7 |
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Age (years) |
56 ± 5 |
55 ± 7 |
57 ± 4 |
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Pack-years (years) |
34 (24-43)### |
36 (27-37)††† |
0 |
|
|
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FEV1/FVC |
0.54 (0.38-0.52) ***### |
0.80 (0.76-0.81) |
0.84 (0.83-0.84) |
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FEV1/VC |
0.48 (0.52-0.62) ***### |
0.79 (0.75-0.83) |
0.77 (0.76-0.80) |
|
|
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FEV1 (L) |
1.58 (1.22-1.94) ***### |
2.89 (2.71-3.57) |
3.32 (2.75-3.94) |
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FEV1 (% predicted) |
53 (47-60)***### |
98 (95-104)† |
109 (106-121) |
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FEV1 reversibility (%) |
14 (4-19)***### |
4 (0-5) |
2 (0-3) |
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FEV1 reversibility (mL) |
190 (75-265)# |
90 (0-170) |
70 (8-105) |
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Data are shown as mean and standard deviation for age, mean and inter quartile range for pack-years, median and inter quartile range for all others. Significant difference between groups is marked with * (COPD vs HS), # (COPD vs NS) and † (HS vs NS). The considered levels of significance were P < 0.05 (*, # or †), P < 0.01 (**, ## or ††) and P < 0.001 (***, ### or †††). FEV1: Forced expiratory volume in one second, measured post bronchodilation; FVC: Forced vital capacity; VC: Vital capacity. |
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Löfdahl et al. Respiratory Research 2011 12:48 doi:10.1186/1465-9921-12-48 |
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