Table 1.

Demographic characteristics at the time of child's birth and current academic characteristics of the ELGAN study samples.

		Total Sample (n=848)		Verbal > 70 & Nonverbal > 70 (n=668)
		Row N	%	Row N	%
Maternal characteristics
Age, years	< 21	110	13	85	13
	21–35	567	67	441	66
	> 35	171	20	142	21
Education, years	≤ 12	340	41	248	38
	> 12, < 16	195	24	147	23
	≥ 16	290	35	254	39
Single marital status	Yes	340	40	243	36
	No	508	60	425	64
Public insurance	Yes	295	35	201	31
	No	541	65	457	69
Racial identity	White	526	63	450	68
	Black	222	26	145	22
	Other	90	11	66	10
Hispanic	Yes	81	10	60	9
	No	764	90	605	91
Newborn characteristics
Sex	Male	435	51	322	48
	Female	413	49	346	52
Gestational age, weeks	23–24	171	20	120	18
	25–26	286	46	297	44
	27	291	34	251	38
Birth weight, grams	≤ 750	308	36	213	32
	751–1000	371	44	307	46
	> 1000	169	20	148	22
Birth weight Z-score	< -2	48	6	35	5
	≥ -2, < -1	112	13	80	12
	≥ -1	688	81	553	83
Academic History
Currently behind expected grade level	Yes	380	45	281	42
	No	468	55	387	58
Ever repeated a grade	Yes	159	19	109	16
	No	689	81	559	84
Ever had an IEP	Yes	452	53	288	43
	No	396	47	380	57