Table 1 Baseline characteristics of the study population
Variables | Patients with COPD(273 cases) |
|---|---|
Male, n(%) | 174(63) |
Age (yr) | 77(8,51 ~ 90) |
Risk factors | Â |
Smokers, n(%) | 224(82) |
Smoking index (pack-yr) | 43(23,10 ~ 120) |
Biomass fuel exposure, n(%) | 42(15) |
Biomass fuel exposure history (yr) | 27(7,10 ~ 40) |
Occupational dust exposure, n(%) | 37(14) |
Occupational dust exposure history (yr) | 25(10,10 ~ 40) |
History of chronic cough/sputum (yr) | 19(12,2 ~ 50) |
History of dyspnea (yr) | 6.1(5.0,0 ~ 20) |
Ratio of dyspnea history to chronic cough/sputum history | 0.32(0.21,0 ~ 1) |
Occurrence of wheezing, n(%) | 214(78) |
FEV1/FVC% | 46(11,22 ~ 69) |
FEV1%predicted | 41(13,14 ~ 79) |
GOLD stage | Â |
Stage II, n(%) | 73(26.8) |
Stage III, n(%) | 131(47.9) |
Stage IV, n(%) | 69(25.3) |
Serum T-IgE (kU/L) | 401(916,2 ~ 7420) |