Predictors of early life milestones: Results from the Copenhagen Perinatal Cohort

BMC Pediatrics

Table 4 Linear regression analysis of selected predictor variables and milestone means (models include all listed variables)

	Overall mean of milestones	Language	Walking	Eating	Dressing	Social interaction	Toilet training
	β	β	β	β	β	β	β
FAMILY BACKGROUND
Parental social status (1–8)	−0.04*	− 0.08***	− 0.04*	− 0.04*	0.02	− 0.05**	0.05*
Parity (first born)	0.02	−0.03	0.02	0.06**	0.06**	0.00	0.01
Paternal age	0.01	−0.02	0.05**	0.06**	−0.03	0.01	−0.01
PREGNANCY AND DELIVERY
Sex (female)	−0.22***	−0.18***	− 0.03	−0.01	− 0.27***	−0.08***	− 0.24***
Gestational age	−0.00	0.04	0.02	−0.02	−0.05*	0.04	−0.01
Birth weight	−0.07*	−0.05	− 0.05	−0.11**	− 0.06	−0.06	− 0.05
Birth weight squared	0.01	0.02	0.01	0.00	0.02	0.01	0.01
Birth length	0.05	0.02	−0.01	0.13***	0.11**	0.04	0.02
Mother’s attitude towards pregnancy (unwanted)	0.00	0.01	−0.01	−0.02	− 0.04*	0.04*	− 0.03
POSTNATAL FACTORS
Breastfeeding	−0.01	−0.01	0.01	−0.02	0.01	−0.01	− 0.01
Mother’s employment (not employed at 1-year)	0.04	0.01	−0.02	0.01	0.05	0.05*	0.03
Full-time institution at some point in the first year	−0.01	− 0.00	0.01	0.01	0.02	0.00	0.01
Daycare institution at some point in the first year	−0.04*	0.00	0.02	−0.04	−0.04	− 0.04	−0.03
POSTNATAL GROWTH AND DEVELOPMENT
Weight increase, first year	−0.07**	−0.06*	− 0.04*	−0.06*	− 0.02	−0.06*	− 0.05*
Length increase, first year	0.01	−0.00	−0.07*	0.06*	0.01	0.03	0.00
Head increase, first year	−0.03	0.01	0.02	−0.03	0.03	−0.03	−0.01
Length increase, age 1–3	0.00	0.02	−0.07**	0.01	0.06*	0.02	−0.02
Overall mean of 1-year milestones	0.35***	0.21***	0.43***	0.22***	0.15***	0.24***	0.19***

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