. Author manuscript; available in PMC: 2022 Aug 1.

Published in final edited form as: J Autism Dev Disord. 2020 Oct 9;51(8):2686–2696. doi: 10.1007/s10803-020-04737-4

Table 4.

Summary of children in each group who met ASD cutoff criterion on the Autism Diagnostic Interview-Revised (ADI-R) for the Reciprocal Social Interaction algorithm, Restricted and Repetitive Behavior (RRB) algorithm, and both domains. Overall results are also stratified by prior ASD diagnosis (Dx) or no prior ASD diagnosis.

Variable	ASD Diagnosis	DD Group	DD Group	DD Group	DD Group
	No ID	Likely SCD	Possible SCD	Some SCD	No SCD
	N=642	N=117	N=118	N=126	N=91
	(4 missing)	(0 missing)	(5 missing)	(1 missing)	(6 missing)
Social cutoff (≥ 10)	600 (94%)	97 (83%)	13 (11%)	0 (0%)	0 (0%)
Prior Dx	519/555 (94%)	46/57 (81%)	4/50 (8%)	0/52 (0%)	0/19 (0%)
No Prior Dx	77/83 (93%)	51/60 (85%)	7/63 (11%)	0/73 (0%)	0/66 (0%)
RRB cutoff (≥3)	600 (94%)	90 (77%)	66 (58%)	67 (54%)	25 (29%)
Prior Dx	522/555 (94%)	46/57 (81%)	33/50 (66%)	39/52 (75%)	8/19 (42%)
No Prior Dx	74/83 (89%)	44/60 (73%)	30/63 (48%)	28/73 (38%)	16/66 (24%)
Social + RRB cutoff	565 (89%)	76 (65%)	8 (7%)	0 (0%)	0 (0%)
Prior Dx	491/555 (88%)	39/57 (68%)	3/50 (6%)	0/52 (0%)	0/19 (0%)
No Prior Dx	70/83 (84%)	37/60 (62%)	3/63 (5%)	0/73 (0%)	0/66 (0%)