Table 3.

 Results of receiver operating characteristic analysis for detection of Alzheimer’s disease with TYM in 94 patients with Alzheimer’s and 282 age matched controls

Score	False +ve rate	Specificity (%)	False −ve rate	Sensitivity (%)	Prevalence
					1%			5%			10%			20%			30%
					PPV	NPV		PPV	NPV		PPV	NPV		PPV	NPV		PPV	NPV
≤38	4	96	25	75	16	100		50	99		68	97		82	94		89	90
≤39	5	95	19	81	14	100		46	99		64	98		80	95		87	92
≤40	8	92	17	83	9	100		35	99		54	98		72	96		82	93
≤41	9	91	13	87	9	100		34	99		52	98		71	97		81	94
≤42	14	86	7	93	6	100		26	100		42	99		62	98		74	97
≤43	17	83	6	94	5	100		23	100		38	99		58	98		70	97
≤44	19	81	5	96	5	100		21	100		36	99		56	99		68	98
≤45	25	75	3	97	4	100		17	100		30	100		49	99		62	98

PPV=positive predictive value; NPV=negative predictive value.