Characteristics | Laval (n=403) | UBC (n=270) | Groningen (n=175) |
---|---|---|---|
Age (years) | 63.4±9.8 | 63.9±10.0 | 59.7±10.0 |
Male/female (n) | 224/179 | 144/126 | 83/92 |
Body mass index (kg/m2) | 26.6±5.2 | 25.7±5.4 | 24.6±4.1 |
FEV1% predicted | 82.2±17.6 | 83.6±22.3 | 72.4±24.9 |
FEV1/FVC | 0.68±0.10 | 0.69±0.13 | 0.64±0.16 |
COPD (%) | 209 (51.9) | 114 (42.2) | 112 (64.0) |
Stage 1: mild | 80 (38.2) | 43 (37.7) | 16 (14.3) |
Stage 2: moderate | 117 (56.0) | 60 (52.6) | 30 (26.8) |
Stage 3: severe | 11 (5.3) | 2 (1.8) | 11 (9.8) |
Stage 4: very severe | 1 (0.5) | 9 (7.9) | 44 (39.3) |
Missing data | 0 | 0 | 11 (9.8) |
Non-COPD (%) | 194 (48.1) | 156 (57.8) | 63 (36.0) |
Smoking (%) | |||
Smoker | 89 (22.1) | 91 (33.7) | 12 (6.9) |
Ex-smoker | 281 (69.7) | 150 (55.6) | 117 (66.9) |
Non-smoker | 33 (8.2) | 16 (5.9) | 43 (24.6) |
Missing data | 0 | 13 (4.8) | 3 (1.7) |
Pack years (years) | 48.6±27.4 | 46.0±28.6 | 32.1±18.1 |
Continuous variables are presented as means±SDs.
UBC, University of British Columbia.