Table 5.

ROC curve analysis: ASD (n = 130) versus nonspectrum (TD/DD; n = 117).

	AUC (SE)	95% CI	Sensitivity	Specificity	Cutoff	PPV	NPV
Composite score	0.87*** (0.02)	0.82–0.91	0.80	0.78	20	0.81	0.78
Number of Red Flags	0.86*** (0.02)	0.81–0.90	0.79	0.75	8	0.78	0.76
SC Domain Score	0.85*** (0.02)	0.80–0.90	0.80	0.72	14	0.76	0.76
SC Red Flags	0.84*** (0.03)	0.79–0.89	0.79	0.68	5	0.73	0.74
RRB Domain Score	0.79*** (0.03)	0.73–0.84	0.79	0.66	4	0.72	0.73
RRB Red Flags	0.75*** (0.03)	0.69–0.81	0.79	0.52	2	0.65	0.69

^***p < 0.001.

ROC: receiver operating characteristics; ASD: autism spectrum disorder; TD: typically developing; DD: developmentally delayed; AUC: area under the curve; SE: standard error; CI: confidence interval; PPV: positive predictive value; NPV: negative predictive value; SC: Social Communication; RRB: Restricted Repetitive Behaviors.