Mean (SD) FEV1, FVC, and FEV1/FVC ratio at 30 years of age, adjusted for sex, height at 30 years, and smoking (vs non-smoking) according to birth weight (n=120)
| Birth weight (kg) | n | FEV1(l) | FVC (l) | FEV1/FVC (%) |
|---|---|---|---|---|
| ⩽2.50 | 4 | 3.09 (0.29) | 3.64 (0.33) | 84.7 (6.2) |
| 2.50–2.74 | 18 | 3.23 (0.46) | 3.69 (0.47) | 87.9 (8.9) |
| 2.75–2.99 | 26 | 3.38 (0.32) | 3.85 (0.50) | 89.1 (5.6) |
| 3.00–3.24 | 36 | 3.34 (0.44) | 3.79 (0.53) | 88.8 (5.4) |
| 3.25–3.49 | 19 | 3.34 (0.41) | 3.81 (0.54) | 88.4 (6.0) |
| 3.50–3.74 | 11 | 3.32 (0.28) | 3.76 (0.36) | 88.5 (4.7) |
| ⩾3.75 | 6 | 3.36 (0.37) | 3.68 (0.47) | 91.0 (4.1) |
| p for trend1-150 | 0.36 | 0.87 | 0.30 |
↵1-150 Using birth weight as a continuous variable.