. 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 5. Intercept and Slope of Linear Developmental Trajectories Predicting Restricted and Repetitive Behavior Severity Score based on Putative Developmental Predictors as Function of Sample.

	CA	Leiter-R NVIQ SS Fragile X Samples	EVT-2 SS
Full Sample FXS (n = 53)	m = .02 (SE = .11)	m = -.04 (SE = .01)	m = -.04 (SE = .01)
Full Sample FXS (n = 53)	b = 4.26, r² <.001	b = 6.83, r² = .15	b = 6.77, r² = .16
FXS+ASD (n = 41)	m = -.04 (SE = .11)	m = -.04 (SE = .02)	m = -.04 (SE = .01)
FXS+ASD (n = 41)	b = 4.68, r² = .003	b = 6.54, r² = .11	b = 6.96, r² = .18
ASD-Severity Matched Sample	m = .04 (SE = .19)	m = -.03 (SE = .03)	m = -.06 (SE = .03)
FXS+ASD (n = 21)	b = 4.76, r² = .002	b = 6.66, r² = .05	b = 8.69, r² = .20

	Nonsyndromic ASD Samples
Nonsyndromic ASD (n = 39)	m = .19 (SE = .17)	m = -.03 (SE = .02)	m = 0 (SE = .02)
Nonsyndromic ASD (n = 39)	b = 4.74, r² = .07	b = 7.27, r² = .09	b = 5.36, r² < .001
ASD-Severity Matched Sample	m = .04 (SE = .28)	m = .01 (SE = .04)	m = .01 (SE = .03)
Nonsyndromic ASD (n = 21)	b = 4.76, r² = .09	b = 4.17, r² = .007	b = 3.68, r² = .11