|
| Elderly (≥65 years) | Non-elderly (<65 years) | p |
| Total number | 1018 | 1023 |
|
| Age, years | 74.4 ± 9.7 | 47.8 ± 11.2 | <0.01 |
| Age group, n (%) |
|
|
|
| <45 years |
| 371 (36.2) |
|
| 45 - 54 years |
| 324 (31.7) |
|
| 55 - 64 years |
| 328 (32.1) |
|
| 65 - 74 years | 553 (54.3) |
|
|
| 75 - 84 years | 384 (37.7) |
|
|
| ≥85 years | 81 (8.0) |
|
|
| Male, n (%) | 374 (36.7) | 373 (36.5) | 0.89 |
| BMI, kg/m2 | 23.4 ± 3.8 | 24.3 ± 5.1 | <0.01 |
| Smoking status, n (%) |
|
| <0.01 |
| Known | 879 | 877 |
|
| Never | 569 (64.7) | 539 (61.5) |
|
| Former | 291 (33.1) | 255 (29.1) |
|
| Current | 19 (2.2) | 83 (9.5) |
|
| Smoking amount, pack-years | 34.2 ± 30.6 | 17.9 ± 16.6 | <0.01 |
| Pulmonary function test |
|
|
|
| VC, % predicted | 94.9 ± 18.1 | 101.6 ± 15.6 | <0.01 |
| FVC, % predicted | 92.7 ± 18.4 | 101.6 ± 15.6 | <0.01 |
| FEV1, % predicted | 83.0 ± 21.7 | 89.9 ± 19.0 | <0.01 |
| FEV1/FVC (%) | 69.1 ± 11.9 | 75.5 ± 11.8 | <0.01 |