Factor | White people | Black people | Other |
---|---|---|---|
N | 5,928 | 3,130 | 5,065 |
Predicted normal FEV1, mean (SD) | |||
White reference values | 3.5 (0.81) | 3.5 (0.79) | 3.4 (0.75) |
Other/mixed reference values | 3.2 (0.76) | 3.2 (0.73) | 3.1 (0.70) |
Black reference values | 3.0 (0.68) | 3.0 (0.66) | 2.9 (0.63) |
Prevalence of impaired FEV 1 (< LLN) using, % | |||
White reference values | 8.5% | 36.9% | 9.5% |
Other/mixed reference values | 5.1% | 21.3% | 4.4% |
Black reference values | 2.4% | 9.3% | 1.5% |
Prevalence of moderate/severe FEV 1 impairment (< 50%pred) using, % | |||
White reference values | 0.8% | 1.7% | 0.5% |
Other/mixed reference values | 0.5% | 1.1% | 0.3% |
Black reference values | 0.4% | 0.8% | 0.2% |