Table 1. Patients Characteristics.
| Variables | Data | |
|---|---|---|
| Age, year | 65.7 ± 11.7 | |
| Sex, male:female | 542:42 | |
| Pack-years | 44.5 ± 26.7 | |
| GOLD stage | ||
| I | 85 | |
| II | 333 | |
| III | 144 | |
| IV | 22 | |
| BODE index | 2.70 ± 1.95 | |
| Pulmonary function tests | ||
| FEV1, liter | 1.6 ± 0.6 | |
| FEV1, % predicted | 52.2 ± 16.5 | |
| FVC, liter | 3.3 ± 0.9 | |
| FVC, % predicted | 79.8 ± 16.4 | |
| FEV1/FVC, % | 46.7 ± 11.1 | |
| FEF25–75%, % predicted | 20.9 ± 10.7 | |
| DLCO, % predicted | 75.7 ± 22.9 | |
| RV, % predicted | 114.6 ± 57.8 | |
| TLC, % predicted | 103.6 ± 22.9 | |
| RV/TLC, % | 41.3 ± 14.2 | |
| 6MWD, meter | 417.9 ± 88.4 | |
| SGRQ score | 30.5 ± 18.6 | |
Data are presented as mean ± standard deviation except sex and GOLD stages of which the data are number of patients. BODE = Body mass index, airflow Obstruction, Dyspnea and Exercise capacity, DLCO = carbon monoxide diffusing capacity corrected for hemoglobin concentration, FEF25–75% = mean forced expiratory flow between 25% and 75% of FVC, FEV1 = forced expiratory volume in 1 second, FVC = forced vital capacity, GOLD = Global Initiative for Obstructive Lung Disease, RV = residual volume, SGRQ = St. George's Respiratory Questionnaire, TLC = total lung capacity, 6MWD = six-minute walk distance