Weight gain# (per one-point z-score increase) | Crude | Adjusted | ||
Regression coefficient | p-value | Regression coefficient (95% CI) | p-value | |
FEV1¶,+ L | ||||
Total group | -0.025 (-0.044– -0.005) | 0.014 | -0.035§ (-0.056– -0.013) | 0.002 |
-0.034ƒ (-0.056– -0.013) | 0.002 | |||
Birthweight <0 z-score | -0.024ƒ (-0.060–0.013) | 0.2 | ||
Birthweight >0 z-score | -0.043ƒ (-0.075– -0.011) | 0.011 | ||
FEF25–75%¶,+ L·s−1 | ||||
Total group | -0.059 (-0.111– -0.008) | 0.024 | -0.079§ (-0.136– -0.023) | 0.006 |
-0.082ƒ (-0.140– -0.024) | 0.006 | |||
Birthweight <0 z-score | -0.062ƒ (-0.160–0.037) | 0.216 | ||
Birthweight >0 z-score | -0.085ƒ (-0.177–0.008) | 0.073 |
FEV1: forced expiratory volume in 1 s; FEF25–75%: forced expiratory flow at 25–75% of forced vital capacity. #: Differences between z-score for weight at 3 months of age (adjusted for the exact age in days) and at birth; ¶: FEV1 and FEF25–75% adjusted for age and length at measurement; +: n=235; §: adjusted for sex and gestational age; ƒ: also adjusted for other potential confounders (maternal smoking during pregnancy, duration of exclusive breastfeeding, siblings, and the ethnicity of the mother). p-values in bold are statistically significant.