Table 1.
Patient Characteristics
| Characteristic | All (N = 657) |
GAP Index Stage 1 (n = 306) |
GAP Index Stage 2 (n = 288) |
GAP Index Stage 3 (n = 63) |
P Value |
|---|---|---|---|---|---|
| Age, y | 62.9 ± 10.0 | 59.2 ± 9.5 | 65.2 ± 9.7 | 70.6 ± 5.0 | < .0001 |
| Male sex, % | 70 | 56.2 | 79.9 | 92.1 | < .0001 |
| FVC, % predicted | 68.0 ± 17.0 | 75.6 ± 16.0 | 63.3 ± 15.1 | 52.7 ± 11.1 | < .0001 |
| Dlco, % predicted | 45.7 ± 16.0 | 54.9 ± 14.9 | 39.5 ± 11.9 | 29.1 ± 8.2 | < .0001 |
Unless otherwise indicated, data are given as mean ± SD. Dlco = diffusing capacity of the lung for CO2; GAP = Gender-Age-Physiology.