Adriëtte Oostvogels

7 Maternal pBMI (kg/m 2 ) Offspring’s postnatal weight gain Offspring’s postnatal weight-for-length gain N % Mean SD Mean SD Mean SD Gestational age (weeks) <37 52 4% 22.6 3.1 0.66* 0.6 0.80* 0.9 37-41 (ref) 987 68% 22.8 3.5 -0.03 0.5 0.19 0.8 ≥41 413 28% 23.0 4.0 -0.23* 0.5 0.08* 0.8 Sex Boy 770 53% 22.8 3.6 -0.05 0.6 0.21 0.8 Girl 689 47% 22.9 3.6 -0.08 0.6 0.15 0.8 Duration of exclusive breastfeeding None 246 17% 23.1 4.0 0.02* 0.6 0.22 0.8 < 1 month 98 7% 23.2 3.8 0.22* 0.6 0.42* 0.7 1-3 months 371 25% 22.6 3.4 -0.07 0.6 0.20 0.8 > 3 months (ref) 741 51% 22.8 3.6 -0.13 0.5 0.13 0.8 Screentime >2 hours 250 17% 23.8* 4.1 0.06* 0.6 0.27 0.8 1-2 hours 654 45% 23.0* 3.9 -0.08 0.6 0.18 0.8 <1 hour (ref) 555 38% 22.2 2.8 -0.10 0.5 0.14 0.7 Energy intake a Low 173 13% 23.0 3.7 -0.15 0.6 0.15 0.8 Normal (ref) 1012 75% 22.7 3.5 -0.08 0.5 0.19 0.8 High 159 12% 23.0 3.7 0.04* 0.6 0.15 0.7 Postnatal growth Weight Decelerated (<-0.67) 174 12% 23.2 3.9 -0.94* 0.2 -0.54* 0.6 Normal (-0.67-0.67) (ref) 1150 79% 22.8 3.5 -0.06 0.3 0.18 0.7 Accelerated (>0.67) 135 9% 23.0 3.8 1.01* 0.3 1.15* 0.8 Weight-for-length Decelerated (<-0.67) 186 13% 22.8 4.0 -0.32* 0.6 0.94* 0.8 Normal (-0.67-0.67) (ref) 921 63% 22.9 3.6 -0.07 0.5 0.17 0.7 Accelerated (>0.67) 352 24% 22.8 3.4 0.27* 0.6 -0.54* 0.8 * p <0.05; pBMI=prepregnancy body mass index; SD=standard deviation a) Categorical classification of energy intake was based on sex and defined as follows: low intake < mean-1SD, normal intake ≥ mean-1SD and ≤ mean+1SD and high intake > mean+1SD (mean (SD) boys: 1594 (350); girls: 1468 (317)). Table 1 - Continued 185 pBMI, postnatal growth and offspring’s CMP