Table 1 Population characteristics (N, medians, 2.5 ^th and 97.5 ^th percentiles) for mothers and boys

N

110

Maternal age (years)

28.2 (21.0-40.0)

Maternal pregnancy BMI (kg/m²)

22.8 (17.9-34.7)

Diabetes (yes, No)

9, 100

Smoking (yes, No)

17, 93

Parity

1

60

2

38

≥3

12

Gestational age (days)

280 (256, 295)

WGA (%)^a

−0.90 (−22.5, 22.6)

Prematurity (N)^b

4

Weight at birth (kg)

3.59 (2.72, 4.52)

Weight at 3 months (kg)

6.48 (5.27, 7.97)

Weight at 18 months (kg)

12.0 (9.91, 14.0)

Length at birth (cm)

51.0 (47.8, 55.0)

Length at 3 months (cm)

62.3 (57.4, 65.1)

Length at 18 months (cm)

84.0 (79.7, 88.7)

PI at birth (kg/m³)

26.5 (21.9, 32.0)

PI at 3 months (kg/m³)

27.1 (22.5, 32.9)

PI at 18 months (kg/m³)

20.1 (16.8, 23.3)