Table 1.
Characteristics of participants in the rate of lung function decline sub-study and the baseline lung function sub-study
| Rate of decline study | Baseline study | |||||
|---|---|---|---|---|---|---|
| Fast decline (n = 278) | Non decline (n = 304) | P value | Low function (n = 535) | High function (n = 533) | P value | |
| Female/Male | 115/163 | 101/203 | 0.04 | 205/330 | 180/353 | 0.12 |
| Age (years) | 49.5 ± 6.7 | 47.6 ± 7.0 | 0.0005 | 50.7 ± 6.9 | 46.2 ± 6.9 | < 0.0001 |
| Smoking (pack-years) | 43.0 ± 18.3 | 38.3 ± 17.4 | 0.003 | 45.3 ± 18.5 | 35.4 ± 18.5 | < 0.0001 |
| ΔFEV1, % predicted/yr* | -3.44 ± 1.17 | 0.68 ± 1.05 | < 0.0001 | -0.78 ± 1.85 | -0.75 ± 1.39 | 0.73 |
| Baseline FEV1, % predicted† | 74.8 ± 8.3 | 80.0 ± 8.7 | < 0.0001 | 62.6 ± 2.3 | 91.8 ± 2.3 | < 0.0001 |
Data are presented as means ± SD. Lung function was measured after administration of bronchodilator.
* Change in lung function per year over a 5 year period
† Lung function at the start of the Lung Health Study