Lung function indices expressed as percentage of predicted value
| Lung function | Index cohort Mean (SD) | Comparison group Mean (SD) | Adjusted difference‡ between means |
|---|---|---|---|
| Mean expressed as percentage predicted for height, age, and gender. | |||
| ‡Adjusted for smoking. | |||
| *p<0.001. | |||
| FVC | 109.5 (14.6) | 106.0 (12.2) | 1.57 (−1.80 to + 4.96) |
| FEV1 | 94.9 (13.8) | 96.5 (10.8) | −2.45 (−5.5 to + 0.67) |
| FEF25–75% | 88.1 (25.6) | 100.5 (20.0) | −12.42 (−18.30 to −6.55)* |
| FEV1/FVC (%) | 87.0 (9.04) | 90.8 (6.4) | −3.53 (−5.52 to −1.53)* |