Table 1

Demographic information of first visit patients with normal spirometry

Age (years)61.016.1
FEV1 SR0.921.24
FVC SR1.401.40
FEV1/FVC SR0.110.76
TLCOc SR−1.351.73
KCOc SR−0.791.51
  • 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.