Table 3.

Associations between growth (conditional on history) and parental rated symptoms of Attention deficit/hyperactivity disorder (ADHD)

Growth variable	Parental rated symptoms of ADHD, Unstandardized regression coefficient (95% CI)
	Model I	Model II
Weight
At birth	-0.37 (-0.64 to -0.09)*	-0.37 (-0.66 to -0.08)*
Growth from birth to 5 months	0.02 (-0.33 to 0.37)	-0.01 (-0.36 to 0.34)
Growth from 5 to 20 months	0.11 (-0.22 to 0.43)	0.09 (-0.24 to 0.41)
Growth from 20 to 56 months	-0.03 (-0.36 to 0.30)	-0.09 (-0.42 to 0.24)
Length/height
At birth	-0.29 (-0.56 to -0.01)*	-0.28 (-0.57 to 0.02)
Growth from birth to 5 months	0.12 (-0.24 to 0.49)	0.12 (-0.25 to 0.48)
Growth from 5 to 20 months	0.03 (-0.29 to 0.36)	0.06 (-0.27 to 0.39)
Growth from 20 to 56 months	0.11 (-0.24 to 0.45)	0.07 (-0.27 to 0.42)
Head circumference
At birth	-0.37 (-0.67 to -0.07)*	-0.33 (-0.63 to -0.02)*
Growth from birth to 5 months	-0.18 (-0.52 to 0.16)	-0.15 (-0.49 to 0.20)
Growth from 5 to 20 months	-0.23 (-0.58 to 0.12)	-0.19 (-0.54 to 0.16)
Growth from 20 to 56 months	-0.25 (-0.59 to 0.10)	-0.25 (-0.59 to 0.09)
Body-mass-index
At birth	-0.22 (-0.50 to 0.05)	-0.22 (0.51 to 0.07)*
Growth from birth to 5 months	-0.02 (-0.36 to 0.32)	-0.08 (-0.41 to 0.27)
Growth from 5 to 20 months	0.07 (-0.27 to 0.41)	0.03 (-0.31 to 0.37)
Growth from 20 to 56 months	-0.31 (-0.65 to 0.02)	-0.37 (-0.70 to -0.03)*

Birth size, growth rates from birth to 5 months, from 5 to 20 months, and from 20 to 56 months are considered simultaneously. The growth variables are expressed as standardized residuals of regression of size at each age stage on size at previous age stage(s), that is, growth conditional on history. Model I includes adjustments for child's sex; Model II includes adjustments for child's sex, gestational age, admission to neonatal ward during the first ten days, multiple pregnancy, mother's smoking during pregnancy, parental education, maternal age and maternal height. * P < 0.05