Table 3.

Mean differences (95% CI) in parent SDQ scores according to birth size z-scores in PROBIT children at age 6.5 years

	Birth weight z-score
	Crude		Adjusted 1		Adjusted 2
Total difficulties	−0.21	(−0.31, −0.11)	−0.15	(−0.26, −0.05)	−0.09	(−0.19, 0.00)
Conduct problems	−0.06	(−0.08, −0.03)	−0.04	(−0.06, −0.01)	−0.03	(−0.05, −0.01)
Hyperactivity	−0.13	(−0.17, −0.09)	−0.11	(−0.15, −0.08)	−0.09	(−0.13, −0.05)
Emotional symptoms	−0.01	(−0.06, 0.04)	−0.001	(−0.05, 0.05)	0.02	(−0.03, 0.07)
Peer problems	−0.01	(−0.04, 0.02)	−0.001	(−0.03, 0.03)	0.004	(−0.02, 0.03)
Prosocial behaviors	0.03	(0.003, 0.06)	0.02	(−0.01, 0.05)	0.01	(−0.02, 0.04)
	Birth length z-score
	Crude		Adjusted 1		Adjusted 2
Total difficulties	−0.14	(−0.25, −0.03)	−0.09	(−0.20, 0.02)	−0.04	(−0.15, 0.07)
Conduct problems	−0.04	(−0.07, −0.01)	−0.03	(−0.06, 0.004)	−0.02	(−0.05, 0.01)
Hyperactivity	−0.09	(−0.12, −0.05)	−0.07	(−0.11, −0.03)	−0.05	(−0.09, −0.01)
Emotional symptoms	−0.01	(−0.04, 0.03)	0.002	(−0.04, 0.04)	0.02	(−0.02, 0.05)
Peer problems	−0.01	(−0.04, 0.02)	0.002	(−0.03, 0.03)	0.01	(−0.02, 0.04)
Prosocial behaviors	0.00	(−0.03, 0.03)	−0.005	(−0.04, 0.03)	−0.02	(−0.05, 0.01)
	Head circumference z-score
	Crude		Adjusted 1		Adjusted 2
Total difficulties	−0.19	(−0.30, −0.08)	−0.16	(−0.28, −0.05)	−0.11	(−0.22, −0.004)
Conduct problems	−0.05	(−0.08, −0.02)	−0.04	(−0.07, −0.02)	−0.04	(−0.06, −0.01)
Hyperactivity	−0.10	(−0.14, −0.06)	−0.09	(−0.14, −0.05)	−0.08	(−0.12, −0.03)
Emotional symptoms	−0.004	(−0.06, 0.05)	0.00	(−0.05, 0.05)	0.02	(−0.04, 0.07)
Peer problems	−0.03	(−0.05, 0.001)	−0.02	(−0.05, 0.003)	−0.01	(−0.04, 0.01)
Prosocial behaviors	0.02	(−0.01, 0.06)	0.02	(−0.02, 0.05)	0.01	(−0.03, 0.04)

Adjusted1: adjusted for maternal and paternal age, maternal height, smoking and drinking during pregnancy;

Adjusted2: adjusted1+ number of children at home, marital status of parents, maternal and paternal education and occupation.