Table 1.
Clinical characteristics and conventional spirometric values of patients
| Mean (SD or %) | N | |
|---|---|---|
| Age | 71 (8) | 61 |
| Male | 59 (96.7) | |
| BMI (kg/m2) | 23.40 (3.40) | 56 |
| Smoking (pack-years) | 44 (19) | 59 |
| FEV1/FVC | 0.48 (0.12) | 60 |
| FEV1 (%) | 65 (18) | 60 |
| DLco (%) | 73 (20) | 59 |
| RV/TLC (%) | 0.42 (0.11) | 57 |
| RV (%) | 113 (43) | 58 |
| IC (L) | 1.98 (0.56) | 56 |
| SGRQ (raw score) | 1112 (571) | 38 |
| 6MWD (m) | 425 (126) | 31 |
| CAT | 12.7 (7.7) | 41 |
Abbreviations: BMI body mass index, FEV 1 forced expiratory volume in one second, FVC forced vital capacity, DLco diffusing capacity for carbon monoxide, RV residual volume, TLC total lung capacity, IC inspiratory capacity, SGRQ St. George’s respiratory questionnaire, 6MWD six-minute walking distance, CAT the chronic obstructive pulmonary disease assessment test