Table 1.
Basic characteristics and spirometry parameters of all participants. Age was shown as median with minimum and maximum, and gender as absolute number. All other data were presented as median with interquartile range. Data were tested by Chi-squared or Mann-Whitney test.
| Parameter | Controls n = 95 | COPD Patients n = 137 | p-Value |
|---|---|---|---|
| age | 64 (46–83) | 65 (44–86) | 0.073 |
| gender male/female | 49/46 | 86/51 | 0.118 |
| FEV1 (L) | 2.60 (2.12–3.19) | 1.08 (0.78–1.57) | <0.001 |
| FEV1 (% pred.) | 93 (86–104) | 39 (28–60) | <0.001 |
| FVC (L) | 3.35 (2.77–4.16) | 2.28 (1.81–2.77) | <0.001 |
| FEV1/FVC (%) | 81 (77–88) | 48 (41–58) | <0.001 |
COPD–chronic obstructive pulmonary disease; FEV1—forced expiratory volume in one second; FVC—forced vital capacity.