Table 7.

Sensitivity, specificity, positive predictive values and negative predictive values of CARS cutoffs for diagnosis of ASD in a 4-year-old sample (N = 230)

CARS cut-off	Sensitivity	Specificity	Positive predictive value	Negative predictive value	False positive errorsa	False negative errorsa
21	0.99	0.70	0.85	0.98	25	1
21.5	0.98	0.72	0.86	0.95	23	3
22	0.97	0.74	0.87	0.92	21	5
22.5	0.95	0.77	0.88	0.89	19	8
23	0.93	0.82	0.90	0.86	15	11
23.5	0.89	0.83	0.90	0.81	14	16
24	0.88	0.87	0.92	0.80	11	18
24.5	0.86	0.93	0.96	0.80	6	20
25	0.84	0.93	0.95	0.77	6	23
25.5	0.82	0.95	0.97	0.74	4	27
26	0.81	0.95	0.97	0.74	4	28
26.5	0.78	0.98	0.98	0.71	2	32
27	0.76	1.00	1.00	0.69	0	36
27.5	0.74	1.00	1.00	0.68	0	39
28	0.71	1.00	1.00	0.66	0	42
28.5	0.69	1.00	1.00	0.64	0	46
29	0.68	1.00	1.00	0.63	0	48
29.5	0.66	1.00	1.00	0.62	0	50

^aFalse positive and false negative errors are reported for each CARS cutoff using diagnosis based on clinical judgment as the gold standard for diagnosis