Table 4.

Child characteristics at birth and psychometric assessments in childhood

		N (%)	10th	25th	50th	75th	90th	95th	Max
Birth Characteristics
Sex		187
Male		89 (48)
Female		97 (52)
Head Circumference (cm)		154	33	34	34	35	36	37	39
Weight (kg)		186	2.6	2.9	3.2	3.5	3.8	3.9	4.2
Height (cm)		181	48	49	50	51	52	54	57
Gestational Age (wks)		185	38	38	39	40	40	41	42
Childhood Psychometric Assessments
Age at Testing (yrs)		178	7	7	7.5	9	10	10	11
Attention Deficit and Hyperactivity Index		181	42	46	52	59	67	73	90
DSM IV Hyperactivity/Impulsivity		181	45	49	55	63	71	77	89
DSM IV Inattention		181	42	45	51	59	67	72	90
DSM IV Total		181	44	48	53	62	69	75	88
Global Restlessness/Impulsivity Index		181	43	46	52	60	68	74	90
Attention problems		181	37	45	56	62	67	69	76
Hyperactivity		181	39	43	47	55	64	68	83
CPT Conners II (Clinical)		185	30	42	50	69	81	93	100
Hit Reaction Time Block Change		185	38	44	50	58	67	73	100