Table 4.
Variable | Change in % Predicted FEV1 | P Value | Change in % Predicted FVC | P Value | Change in % FEV1/FVC | P Value |
---|---|---|---|---|---|---|
One additional joint-year | 0.02 ± 0.02 | 0.4 | 0.07 ± 0.02 | 0.004 | −0.03 ± 0.01 | 0.02 |
One additional tobacco pack-year | −0.13 ± 0.02 | <0.0001 | −0.04 ± 0.03 | 0.2 | −0.1 ± 0.01 | <0.0001 |
Increasing age, yr | −0.09 ± 0.002 | 0.001 | −0.11 ± 0.02 | <0.0001 | −0.2 ± 0.02 | <0.0001 |
White race | 1.12 ± 0.66 | 0.1 | 1.8 ± 0.7 | 0.02 | −1.7 ± 0.3 | <0.0001 |
Female | 1.80 ± 0.4 | 0.001 | 2.69 ± 0.53 | 0.0001 | 1.5 ± 0.3 | 0.0002 |
History of asthma | −5.3 ± 1.11 | 0.0002 | −2.19 ± 1.06 | 0.06 | −3.0 ± 0.3 | <0.0001 |
History of chronic bronchitis | −3.2 ± 1.65 | 0.07 | −3.25 ± 1.56 | 0.05 | −0.3 ± 0.6 | 0.6 |
History of emphysema | −8.67 ± 6.91 | 0.2 | −1.86 ± 5.13 | 0.7 | −6.5 ± 2.9 | 0.04 |