Table 2. Obesity or overweight status of the children by sibling rank.

	ObOw (BMI z score >2)
	Specification 1a		Specification 2 b		Specification 3 c
Sibling rankd	OR	95%CI	OR	95%CI	OR	95%CI
First-born child	0.69	0.33–1.44	0.71	0.35–1.44	0.66	0.31–1.41
Second-born child	1.40	1.38–1.43	1.45	1.25–1.67	1.32	1.07–1.63
Third-born or younger child	1.70	1.28–2.25	1.73	1.42–2.11	1.38	1.17–1.63

a: No adjustment was performed

b: Adjusted for gender, birthweight, health status of the child, duration of breastfeeding, maternal age at delivery, gestational age, age of child, child age squared, ethnic group

c: Adjusted for gender, birthweight, health status of the child, duration of breastfeeding, maternal age at delivery, gestational age, age of child, child’s age squared, ethnic group, level of education attained by the mother, level of education attained by the father, family income per capita, child’s caregiver, parental emotional support

d: Reference: Child without siblings