Table 3.

Prevalence Free Diagnostic Accuracy Statistics for NAB List Learning Variables at Conventional Cutoff Scores

		Impaireda vs. Control				aMCI vs. Control				AD vs. Control				AD vs. aMCI
Variable	Cutoff (T ≤)	Sn	Sp	PLR	NLR	Sn	Sp	PLR	NLR	Sn	Sp	PLR	NLR	Sn	Sp	PLR	NLR
List A Immediate Recall	40	.66	.90	6.41	0.38	.48	.90	4.73	0.58	.85	.90	8.29	0.17	.85	.52	1.75	0.30
	35	.51	1.00	--	0.49	.35	1.00	--	0.66	.69	1.00	--	0.31	.69	.66	2.01	0.47
	30	.35	1.00	--	0.65	.17	1.00	--	0.86	.58	1.00	--	0.42	.58	.86	4.18	0.49
List B Immediate Recall	40	.40	.94	6.53	0.64	.28	.94	4.51	0.77	.54	.94	8.79	0.49	.54	.72	1.95	0.64
	35	.22	1.00	--	0.78	.10	1.00	--	0.89	.35	1.00	--	0.65	.35	.90	3.35	0.73
	30	.11	1.00	--	0.89	.07	1.00	--	0.93	.15	1.00	--	0.85	.15	.93	2.23	0.91
List A Short Delay Recall	40	.75	.96	18.26	0.27	.59	.96	14.36	0.43	.92	.96	22.62	0.08	.92	.41	1.57	0.19
	35	.60	.97	19.60	0.41	.38	.97	12.39	0.64	.85	.97	27.64	0.16	.85	.62	2.23	0.25
	30	.44	1.00	--	0.56	.17	1.00	--	0.83	.73	1.00	--	0.27	.73	.83	4.24	0.33
List A Long Delay Recall	40	.76	.97	24.95	0.24	.62	.97	20.28	0.39	.92	.97	30.15	0.08	.92	.38	1.49	0.20
	35	.64	.98	31.18	0.37	.48	.98	23.66	0.53	.81	.98	39.58	0.20	.81	.52	1.67	0.37
	30	.35	.99	33.85	0.66	.24	.99	23.66	0.77	.46	.99	45.23	0.54	.46	.76	1.91	0.71

Note. aMCI = Mild Cognitive Impairment; AD = Alzheimer’s disease; Sn = Sensitivity; Sp = Specificity; PLR = Positive Likelihood Ratio; NLR = Negative Likelihood Ratio. Dashes represent a value of positive infinity due to a specificity of 1.00.

^aIncludes both aMCI and AD.