FEV1/FVC <0.7 (GOLD) n = 366* | FEV1/FVC <1.645 SD below predicted (ATS/ERS) n = 163* | All N = 3,892 | |
---|---|---|---|
Physician-diagnosed COPD,% | 5.7 | 9.8 | 0.8 |
Chronic bronchitis symptoms,% | 4.6 | 7.4 | 2.3 |
Women,% | 49.2 | 66.9 | 52.5 |
Age (mean ± SD), yrs | 58.3 ± 9.5 | 54.9 ± 10.3 | 51.7 ± 10.6 |
BMI (mean ± SD), kg/m2 | 25.6 ± 3.9 | 25 ± 3.8 | 26.1 ± 4 |
Spirometry | |||
FEV1 (L) (mean ± SD) | 2.7 ± 0.8 | 2.5 ± 0.8 | 3.3 ± 0.8 |
FEV1% (mean ± SD) | 65.1 ± 5.3 | 61.9 ± 6.3 | 78.0 ± 6.3 |
FEV1/FVC (mean ± SD) | 64.9 ± 5.3 | 61.7 ± 6.3 | 77.9 ± 6.4 |
Dyspnea,% | 6.3 | 9.2 | 6.3 |
Wheezing,% | 24.6 | 31.3 | 14.6 |
Treatment with respiratory drugs,% | 4.6 | 8 | 1.1 |
Smoking habits | |||
Never-smokers,% | 29.8 | 27.6 | 47.7 |
Former smokers,% | 38.8 | 35.6 | 36.2 |
Current smokers,% | 31.4 | 36.8 | 16.1 |
Pack/years in current and former smokers (mean ± SD) | 22.6 ± 15.5 | 22.2 ± 13.8 | 15 ± 12.2 |