Table 4.

ROC Analyses to Examine Optimal Thresholds for the Social-Communication Criteria.

	A1 (10 ADI-R, ADOS)		A2 (12 ADI-R, ADOS)		A3 (3 ADI-R)
Cutoff	Sensitivity	Specificity	Sensitivity	Specificity	Sensitivity	Specificity
-1	1	0	1	0	1	0
0.5	1	0.029	1	0.014	0.951	0.348
1.5	1	0.087	1	0.123	0.873	0.558
2.5	0.996	0.196	0.996	0.225	0.725	0.746
3.5	0.993	0.304	0.986	0.377	0.577	0.891
4.5	0.989	0.42	0.979	0.507	0.363	0.971
5.5	0.982	0.5	0.958	0.609	0.092	0.978
6.5	0.965	0.601	0.944	0.652	0	1
7.5	0.947	0.674	0.908	0.761
8.5	0.919	0.783	0.88	0.804
9.5	0.884	0.862	0.852	0.891
10.5	0.835	0.899	0.782	0.92
11.5	0.764	0.942	0.711	0.949
12.5	0.68	0.957	0.637	0.971
13.5	0.623	0.957	0.56	0.986
14.5	0.539	0.964	0.511	0.993
15.5	0.426	0.978	0.384	0.993
16.5	0.313	0.978	0.296	0.993
17.5	0.229	0.986	0.246	0.993
18.5	0.144	1	0.162	1
19.5	0.046	1	0.106	1
20.5	0	1	0.056	1
21.5			0.028	1
22.5			0.011	1
23.5			0	1

Note. Shading indicates the optimal cutoff balancing sens and spec.