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. Author manuscript; available in PMC: 2017 Jun 1.

Published in final edited form as: J Autism Dev Disord. 2016 Jun;46(6):2160–2173. doi: 10.1007/s10803-016-2745-1

Table 2.

Sample Demographics

	Optimal Progress	ASD	Total Sample	t or X², p	Effect Size

	N = 19	N = 171	N = 190
Age in Months (M, SD)

Average age at Time 1	26.21 (4.81)	26.32 (4.37)	26.31 (4.40)	t(187) = 0.10, p = .921	d = .02
Average age at Time 2	51.47 (4.81)	52.30 (9.75)	52.22 (9.52)	t(188) = .36, p = .718,	d = .11

Gender (N, %)				X²(1) = 2.69, p = .101	ϕ = .12

Male	13 (68.4)	143 (83.6)	156 (82.1)
Female	6 (31.6)	28 (16.4)	34 (17.9)

Race/Ethnicity (N, %)				Fisher’s Exact Test = 3.85, p =.605

White	16 (84.2)	139 (81.3)	155 (81.6)
Hispanic/Latino	1 (5.3)	11 (6.4)	12 (6.3)
Black or African American	0 (0)	7 (4.1)	7 (3.7)
Asian or Pacific Islander	1 (5.3)	4 (2.3)	5 (2.6)
Biracial	1 (5.3)	3 (1.8)	4 (2.1)
Other	0 (0)	1 (0.6)	1 (0.5)
Not Available	0 (0)	6 (3.5)	6 (3.2)