Table 1.

Demographic Characteristics of 4 and 9 month groups

4 Month n=70		9 Month n=25
Factor	Mean (SD)	Factor	Mean (SD)
Gender		Gender
Male	53%	Male	52.00%
Female	47%	Female	48.00%
Birth weight (g)	3269.66 (423.91)	Birth weight (g)	3231.38 (417.78)
Child Ethnicity	Frequency (%)	Child Ethnicity	Frequency (%)
African American	1 (1.43%)	African American	0
White	20 (28.57%)	White	6 (24.00%)
Native American	5 (7.14%)	Native American	1 (4.00%)
Hispanic/Latino	36 (51.43%)	Hispanic/Latino	14 (56.00%)
3+ races not identified	2 (2.86%)	3+ races not identified	2 (8.00%)
Hispanic/White	3 (4.29%)	Hispanic/White	2 (8.00%)
Hispanic/Native American	3 (4.29%)	Hispanic/Native American	0
Maternal age (years)	26.8 (6.31)	Maternal age (years)	27.88 (7.26)
Maternal Education	Frequency (%)	Maternal Education	Frequency (%)
Less than HS	17 (24.29%)	Less than HS	4 (16.00%)
High School	14 (20.00%)	High School	8 (32.00%)
At least 1 yr college	18 (25.71%)	At least 1 yr college	6 (24.00%)
Assoc. degree	6 (8.57%)	Assoc. degree	1 (4.00%)
Bachelors degree	8 (11.43%)	Bachelors degree	1 (4.00%)
Some grad school	1 (1.43%)	Some grad school	1 (4.00%)
Masters degree or higher	6 (8.57%)	Masters degree or higher	4 (16.00%)
Household Income	Frequency (%)	Household Income	Frequency (%)
Under $10K	9 (12.86%)	Under $10K	3 (12.00%)
$10–$20K	21 (30.00%)	$10–$20K	7 (28.00%)
$20–$30K	8 (11.43%)	$20–$30K	4 (16.00%)
$30–$40K	3 (4.29%)	$30–$40K	0
$40–$50K	6 (8.57%)	$40–$50K	2 (8.00%)
$50–$60K	6 (8.57%)	$50–$60K	3 (12.00%)
$60–$70K	6 (8.57%)	$60–$70K	2 (8.00%)
Over $70K	9 (12.86%)	Over $70K	3 (12.00%)
No data	2 (2.86%)	No data	1 (4.00%)
Age at testing (months)	4.10 (0.46)	Age at testing (months)	9.30 (0.42)
KENT cognitive (%)	96.33 (4.80)	BSID-III Cognitive SS	108.2 (7.05)