. Author manuscript; available in PMC: 2016 Sep 1.

Published in final edited form as: J Autism Dev Disord. 2015 Sep;45(9):2816–2832. doi: 10.1007/s10803-015-2443-4

Table 4. Intercept and Slope of Linear Developmental Trajectories Predicting Social Affective Severity Score based on Putative Developmental Predictors as Function of Sample.

ADAMS Subscale	CA	Leiter NVIQ SS Fragile X Samples	EVT SS
Full Sample FXS (n = 53)	m = .38 (SE = .14)	m = -.07 (SE = .02)	m = -.006 (SE = .02)
Full Sample FXS (n = 53)	b = 4.67, r² = .11	b = 10.15, r² = .19	b = 6.33, r² =.002
FXS+ASD (n = 41)	m = .27 (SE = .15)	m = -.05 (SE = .02)	m = .009 (SE = .02)
FXS+ASD (n = 41)	b = 5.32, r² = .07	b = 8.95, r² = .10	b = 5.69, r² = .005
ASD-Severity Matched Sample	m = .34 (SE = .21)	m = -.05(SE = .03)	m = -.006 (SE = .03)
FXS+ASD (n = 21)	b = 4.89, r² = .13	b = 10.16, r² = .14	b = 7.83, r² = .002

	Nonsyndromic ASD Samples
Nonsyndromic ASD (n = 39)	m = .02 (SE = .22)	m = .003 (SE = .03)	m = .004 (SE = .02)
Nonsyndromic ASD (n = 39)	b = 7.77, r² <.001	b = 7.62, r² <.001	b = 7.61, r² <.003
ASD-Severity Matched Sample	m = .01(SE = .30)	m = .008 (SE = .05)	m = .01(SE = .04)
Nonsyndromic ASD (n = 21)	b = 7.23, r² < .001	b = 6.78, r² = .003	b = 6.75, r² = .02