Table 2.

Description of the study population (total $N=\mathrm{1,301}$).

	$N$ (%)	Percentiles: 25th; 50th; 75th	$N$ missing
Cohort
BiB, UK	205 (15.8)		0
EDEN, France	198 (15.2)		0
INMA, Spain	223 (17.1)		0
KANC, Lithuania	204 (15.9)		0
MoBa, Norway	272 (20.9)		0
Rhea, Greece	199 (15.3)		0
Age of the child at examination (y)		6.5; 8.1; 8.9	0
Sex of the child			0
Male	711 (54.7)
Female	590 (45.3)
Birthweight (g)		3,050; 3,380; 3,714	14
Maternal age at delivery (y)		27.2; 31.0; 34.0	16
Maternal prepregnancy BMI, $\mathrm{kg}/{\mathrm{m}}^2$		21.3; 23.9; 27.2	24
Maternal education level			44
Low (primary school)	173 (13.8)
Middle (secondary school)	433 (34.5)
High (university degree or higher)	651 (51.8)
Parental country of origin			30
Both parents native	1,068 (84.0)
None or one native parents	203 (16.0)
Parity			31
Nulliparous	583 (45.9)
Primiparous	460 (36.2)
Multiparous	227 (17.9)
Breastfeeding duration (wk)			353
$<10.8$	313 (33.0)
10.8–34.9	314 (33.1)
$>34.9$	321 (33.9)
Child overweight/obese status			0
Normal or underweight	937 (71.3)
Overweight and obese	374 (28.8)
Obese	129 (9.9)
BMI z-score		$-0.39$; 0.28; 1.10	0
Waist circumference z-score		$-0.69$; $-0.25$; 0.48	4
Skinfolds z-score		$-0.68$; $-0.32$; 0.34	13
Fat mass percentage z-score		$-0.75$; $-0.15$; 0.65	11

Note: BiB, Born in Bradford study cohort; BMI, body mass index; EDEN, Etude de cohorte généraliste, menée en France sur les Déterminants pré et post natals précoces du développement psychomoteur et de la santé de l’Enfant study cohort; INMA, INfancia y Medio Ambiente study cohort; KANC, Kaunas study cohort; MoBa, Norwegian Mother and Child Cohort; Rhea, Rhea Study Mother and Child Cohort.