Table 1.

Summary of predisposing factors and differences between participant cohorts

Predisposing factors	AIC sample (N = 218)	AIC sample range	RI-CART sample (N = 255)	RI-CART sample range	AIC vs RI-CART (p value)
Ethnicity (Non-hispanic/latino) N(%)	202 (94.8%)		207 (81%)		0.003
Race (Caucasian) N(%)	187 (85.8%)		232 (91%)		0.083
Intellectual disability present N(%)	101 (46.3%)		58 (22.7%)		<0.0001*
Nonverbal N(%)	46 (21.1%)		25 (9.8%)		0.001*
Vineland-2 M(SD)
Communication domain standard score	59.5 (17.6)	12–135	71.2 (17.5)	28–131	<0.0001*
Daily living skills standard score	61.3 (19.4)	7–127	72.4 (18.1)	25–128	<0.0001*
Socialization standard score	54.6 (19.4)	29–92	64.8 (15.5)	34–114	<0.0001*
Adaptive behavior composite	57.5 (15.1)	25–118	68 (15)	27–109	<0.0001*
ADOS-2 results M(SD)
Overall severity score	7.95 (1.7)	4–19	7.37 (1.8)	4–10	0.001*
Social affect severity score	7.9 (1.5)	3–10	7.3 (1.8)	3–10	<0.0001*
Repetitive restrictive behavior severity score	7.3 (2)	1–10	7.3 (2.3)	1–10	0.75

^*Comparisons are statistically significant at a Bonferroni-corrected p < 0.003*