Table 1 Anthropometric and pulmonary function data for the 221 subjects
Volunteers (n = 20)COPD (n = 201)
Age (years)64 (16)71 (7)**
Smoking Index (pack-years)57 (44)71 (38)
Height (cm)166 (7)163 (6)*
Weight (kg)64 (7)57 (9)**
BMI (kg/ m2)23.2 (2.2)21.4 (2.9)**
BSA (m2)1.71 (0.13)1.60 (0.13)**
FVC (%predicted)95 (18)72 (18)**
FEV1 (%predicted)96 (21)46 (18)**
FEV1/FVC (%)73 (11)43 (12)**
RV/TLC (%)34 (9)47 (9)**
Tlco (mmol/min/kPa/l)1.50 (0.29)1.04 (0.43)**
  • Values are mean (SD).

  • Smoking Index  =  (the average number of packs smoked/day (20 cigarettes/pack) × years of smoking).

  • BMI, body mass index; BSA, body surface area; COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; RV, residual volume; TLC, total lung capacity; Tlco, carbon monoxide transfer coefficient.

  • *p<0.05, **p<0.01 compared with volunteers.