. Author manuscript; available in PMC: 2010 Mar 15.

Published in final edited form as: J Intellect Disabil Res. 2008 Apr 27;52(10):819–829. doi: 10.1111/j.1365-2788.2008.01065.x

Table 1.

Participant subject characteristics

	n = 169
Age in years (mean, SD)	3.51 (0.86)
Sex (n)
Male	132
Female	38
Ethnicity (n)
Caucasian	98
African-American	6
Hispanic	14
Asian/Pacific Islander	9
Other	13
Not reported	30
MSEL Visual Reception AE (mean, SD)	1.89 (0.78)
MSEL Expressive Language AE (mean, SD)	1.39 (0.80)
Vineland ABC (mean, SD)	60.44 (7.45)

MSEL AE (Age-Equivalencies) are in months. Participants for whom parents did not report ethnicity were not included in analyses involving ethnicity.

ABC, Adaptive Behaviour Composite; MSEL, Mullen Scales of Early Learning.