Table 3.

Differences between groups for birth (full term, moderately preterm, very preterm): Tukey’s HSD Test (Honestly Significant Difference).

Variable	Birth (I)	Birth (J)	Differences between means (I-J)	Std. error	P value
Hyperactivity/impulsivity	Full term	Moderately preterm	4.17	1.09	0.001
		Very preterm	4.65	0.98	0.001
	Moderately preterm	Full term	4.17	1.09	0.001
		Very preterm	-0.48	1.19	n.s.
	Very preterm	Full term	4.65	0.98	0.001
		Moderately preterm	0.48	1.19	n.s.
Inattention	Full term	Moderately preterm	-3.83	1.24	0.007
		Very preterm	-3.54	1.11	0.005
	Moderately preterm	Full term	3.83	1.24	0.007
		Very preterm	0.28	1.35	n.s.
	Very preterm	Full term	3.54	1.11	0.005
		Moderately preterm	-0.28	1.35	n.s.