Association of FEV0.4 with birth weight status and other factors
| Difference in FEV0.4 (ml) | 95% CI of difference | p value | |
|---|---|---|---|
| *Adjusted for birth weight status, sex, weight and length at test, postnatal age, maternal smoking, maternal social class, maternal height, and family history of asthma. | |||
| Univariate analyses | |||
| Birth weight status (baseline: appropriate birth weight for gestation) | −19.4 | −26.5 to −12.3 | <0.001 |
| Sex (baseline: female) | −0.7 | −8.1 to 6.7 | 0.85 |
| Weight at test (per kg) | 18.8 | 14.7 to 22.9 | <0.001 |
| Length at test (per cm) | 6.5 | 5.5 to 7.5 | <0.001 |
| Postnatal age (per week) | 6.6 | 5.1 to 8.1 | <0.001 |
| Maternal smoking (baseline: no maternal smoking) | −8.6 | −16.1 to −1.2 | 0.02 |
| Maternal social class (baseline: non-manual occupation) | −14.6 | −23.4 to −5.8 | 0.001 |
| Maternal height (per cm) | 0.8 | 0.3 to 1.4 | 0.004 |
| Family history of asthma (baseline: no history of asthma) | −7.3 | −15.4 to 0.9 | 0.08 |
| Multivariate analysis* | |||
| Birth weight status (baseline: appropriate birth weight for gestation) | −11.2 | −18.0 to −4.3 | 0.002 |
| Sex (baseline: female) | −6.8 | −12.6 to −1.1 | 0.02 |
| Weight at test (per kg) | −6.6 | −13.5 to 0.3 | 0.06 |
| Length at test (per cm) | 5.6 | 3.6 to 7.7 | <0.001 |
| Postnatal age (per week) | 3.2 | 1.3 to 5.2 | 0.001 |
| Maternal smoking (baseline: no maternal smoking) | −3.6 | −9.5 to 2.2 | 0.22 |
| Maternal social class (baseline: non-manual occupation) | −2.1 | −9.3 to 5.1 | 0.65 |
| Maternal height (per cm) | 0.1 | −0.4 to 0.5 | 0.70 |
| Family history of asthma (baseline: no history of asthma) | −5.4 | −11.5 to 0.6 | 0.08 |