Table 2.

Classification Accuracy of PQ-16 (ie, Sensitivity, Specificity, Predictive Values, Likelihood Ratio, Area Under the Curve, and Confidence Intervals) vs CAARMS Diagnosis of UHR/Psychosis vs No CAARMS Diagnosis

PQ-16 Cutoff, Total Score	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	LR+ (%)	AUC	95% CI	P
≥0	100	0	11	—	1.00	0.93	0.92–0.94	.0001
≥1	100	16	12	100	1.19	0.93	0.92–0.94	.0001
≥2	100	34	15	100	1.51	0.93	0.92–0.94	.0001
≥3	100	52	19	100	2.06	0.93	0.92–0.94	.0001
≥4	97	67	26	99	2.93	0.93	0.92–0.94	.0001
≥5	91	79	34	99	4.30	0.93	0.92–0.94	.0001
≥6a	87	87	44	98	6.75	0.93	0.92–0.94	.0001
≥7	76	92	53	97	9.61	0.93	0.92–0.94	.0001
≥8	58	95	59	95	12.48	0.93	0.92–0.94	.0001
≥9	43	97	63	94	14.37	0.93	0.92–0.94	.0001
≥10	31	99	72	92	21.47	0.93	0.92–0.94	.0001
≥11	22	99	75	92	25.34	0.93	0.92–0.94	.0001
≥12	16	100	81	91	35.42	0.93	0.92–0.94	.0001
≥13	10	100	86	90	51.29	0.93	0.92–0.94	.0001
≥14	5	100	86	90	54.14	0.93	0.92–0.94	.0001
≥15	3	100	92	90	94.04	0.93	0.92–0.94	.0001
≥16	1	100	100	90	—	0.93	0.92–0.94	.0001

Note: PQ, Prodromal Questionnaire.

^aHighest average of sensitivity and specificity.