Table 1

Demographics and lung function data for adults undergoing bronchoscopy and bronchial biopsy

Active smokersNever smokers
n1611
Men/women12/44/7
Age (years)50 (30 to 66)54 (41 to 68)
Smoking (pack-years)32 (10 to 57)0
FEV1 (% predicted)* 99 (78 to 125)† 114 (113 to 125)
FEV1/FVC ratio (% predicted)* 77 (70 to 96)82 (71 to 88)

  • Data expressed as median (range).

  • There was no difference in FEV1/FVC ratio between the two groups.

  • ↵* After 400 μg inhaled salbutamol.

  • ↵† p<0.01 versus never smokers.

  • FEV1, forced expiratory volume in one second; FVC, forced vital capacity.