Lung function estimates for BX (Polgar reference)
| Strategy | Intercept at age 10(95% CI) | Slope (95% CI) | |
|---|---|---|---|
| FEF25–75, forced expiratory flow 25–75%; FEV1, forced expiratory volume in 1 second, FVC, forced vital capacity. | |||
| FVC (% predicted) | Best annual | 79% (74 to 83) | −0.7% (−1.7 to +0.3) |
| All data | 74% (70 to 78) | −0.0% (−1.0 to +1.0) | |
| FEV1 (% predicted) | Best annual | 68% (63 to 72) | −1.9% (−2.9 to −0.9) |
| All data | 63% (58 to 68) | −0.9% (−1.6 to −0.1) | |
| FEF25–75 (% predicted) | Best annual | 61% (53 to 68) | −2.6% (−3.9 to −1.4) |
| All data | 52% (45 to 59) | −1.1% (−2.1 to 0.0) | |
| FEV1/FVC ratio | Best annual | 79% (76 to 82) | −1.1% (−1.5 to −0.7) |
| All data | 76% (74 to 79) | −0.9% (−1.4 to −0.3) | |