TABLE 1

Subject details by group of lung function classification method (n=689)

GroupNormalFR+LLNFR+LLN+p-value
Subjects n (%)545 (79.1)56 (8.1)88 (12.8)
Height m1.75±0.061.75±0.071.76±0.070.115
BMI kg·m−224.6±3.024.6±3.323.7±3.20.025
Current smokers58.575.075.00.001
Ever-smokers83.087.592.00.089
Diabetes1.71.83.40.700
Cholesterol# mmol·L−16.39±1.146.48±1.036.21±1.100.297
SBP mmHg139±22141±23139±210.772
DBP mmHg85±1284±1484±120.771
VC L4.4±0.74.2±0.64.2±0.80.016
FEV1 L3.5±0.52.9±0.42.5±0.6<0.001
  • Data are presented as mean±sd or %, unless otherwise stated. FR: fixed ratio; LLN: lower limit of normal; BMI: body mass index; SBP: systolic blood pressure; DBP: diastolic blood pressure; VC: vital capacity; FEV1: forced expiratory volume in 1 s. #: n=687.