Table 3.
Lung Tissue Research Consortium Cohort Demographics
| Control | Mild-Moderate COPD | Severe COPD | P Value | |
|---|---|---|---|---|
| n | 346 | 327 | 256 | |
| Age, yr | 61.6 ± 12.5 | 67.8 ± 9.4 | 60.7 ± 8.2 | <0.001 |
| Male | 136 (39.3) | 197 (60.2) | 131 (51.2) | <0.001 |
| White race | 312 (90.2) | 303 (92.7) | 230 (89.8) | 0.54 |
| Former smoker | 199 (57.5) | 254 (77.7) | 222 (86.7) | <0.001 |
| Smoking pack-years | 20.2 (27.4) | 47.0 (35.7) | 44.4 (27.5) | <0.001 |
| FEV1% predicted | 95.9 (12.6) | 70.5 (16.3) | 25.2 (9.1) | <0.001 |
| GOLD category | 0 (0) | 1.65 (0.5) | 3.7 (0.5) | <0.001 |
Definition of abbreviations: COPD = chronic obstructive pulmonary disease; GOLD = Global Initiative for Chronic Obstructive Lung Disease.
Data show mean ± SD or n (%). t test for continuous variables (age, smoking pack-years, FEV1). Chi-square tests for categorical variables (sex, smoking status, GOLD).