Infant characteristics in relation to infant BMI peak trajectories
| Magnitude (kg/m2), mean (95% CI) | Age (months), mean (95% CI) | Prepeak velocities (kg/m2/month) mean (95% CI) | |
| Total (n=2073) | 18.33 (18.26 to 18.39) | 7.61 (7.55 to 7.67) | 0.43 (0.42 to 0.44) |
| Gender | |||
| Male (n=1022) | 18.60 (18.21 to 18.69)*** | 7.54 (7.46 to 7.63)* | 0.42 (0.41 to 0.43) |
| Female (n=1051) | 18.07 (17.98 to 18.16) | 7.67 (7.59 to 7.76) | 0.43 (0.42 to 0.44) |
| Birth weight | |||
| 1.5 to <2.5 kg (n=30) | 17.63 (17.13 to 18.13) | 8.13 (7.56 to 8.70) | 0.44 (0.35 to 0.53) |
| 2.5 to <4.0 kg (n=1905) | 18.27 (18.21 to 18.34) | 7.63 (7.57 to 7.70) | 0.43 (0.42 to 0.44) |
| ≥4 kg (n=138) | 19.25 (18.97 to 19.52)* | 7.11 (6.88 to 7.34)*** | 0.39 (0.35 to 0.42) |
| Delivery mode | |||
| Vaginal birth (n=989) | 18.24 (18.14 to 18.34) | 7.64 (7.56 to 7.73) | 0.43 (0.42 to 0.44) |
| Caesarean section (n=1084) | 18.41 (18.32 to 18.50)*** | 7.58 (7.49 to 7.66) | 0.43 (0.42 to 0.44) |
| Maternal age | |||
| >35 years (n=159) | 18.42 (18.18 to 18.66) | 7.61 (7.49 to 7.82) | 0.44 (0.41 to 0.48) |
| ≤35 years (n=1914) | 18.32 (18.25 to 18.39) | 7.61 (7.55 to 7.67) | 0.42 (0.41 to 0.43) |
The analysis includes only infants who had BMI peak within 0–408 days and whose BMI trajectories were estimable by the quadratic model.
Bivariate comparison was performed using one-way analysis of variance with post hoc Bonferroni multiple comparison test.
*p<0.05; ***p<0.001.
BMI, body mass index.