Table 2.
Demographic information of first visit patients with normal spirometry but abnormal gas transfer
| Male:female | 2809:2047 |
| Mean | SD | |
| Age (years) | 67.1 | 13.2 |
| FEV1 SR | 1.18 | 1.23 |
| FVC SR | 1.72 | 1.40 |
| FEV1/FVC SR | 0.32 | 0.64 |
| TLCOc SR | −3.12 | 1.24 |
| KCOc SR | −2.14 | 1.28 |
Lung function results are presented as standardised residual (SR).
FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; KCOc, transfer coefficient of the lung for carbon monoxide corrected; TLCOc, transfer for carbon monoxide corrected.