Table 1. Descriptive Statistics for Age, Segmentation Agreement, Everyday Memory, and Brain Volume.

Variable	CDR score = 0				CDR score = 0.5				CDR score = 1
	M	Median	Range	d (CDR = 0 vs. 0.5)a	M	Median	Range	d (CDR =0.5 vs. l)a	M	Median	Range	d (CDR = 0 vs. l)a
Age (years)	74.65	75.00	65–86	−0.55	77.83	78.00	66–86	0.05	77.55	78.00	63–90	−0.47
Segmentation agreement
Breakfast	.38	.34	.24–.58	0.20	.36	.33	.07–.59	0.62	.28	.29	.00–.46	0.84
Library	.45	.45	.27–.61	0.72	.39	.40	.18–.64	0.72	.30	.32	.05–.52	1.33
Party	.43	.42	.19–.68	0.59	.36	.35	.03–.59	0.78	.28	.29	.04–.40	1.36
Recall
Breakfast	22.18	21.00	1–61	0.88	13.10	13.00	0–31	1.26	4.24	3.00	0–23	1.94
Library	13.03	12.50	1–34	0.64	6.78	6.00	0–24	1.29	1.81	2.00	0–10	1.86
Party	26.65	22.50	1–74	0.77	13.24	10.00	0–57	1.00	2.76	1.00	0–12	1.65
Recognition
Breakfast	.71	.70	.40–.90	0.50	.65	.65	.30–.90	1.09	.50	.50	.30–.80	1.60
Library	.77	.80	.20–.95	0.33	.72	.70	.35–1.0	1.12	.55	.53	.25–.80	1.58
Party	.88	.90	.20–.1.0	0.66	.78	.80	.40–1.0	1.26	.60	.60	.40–.90	1.90
Order memory (errors)
Breakfast	0.66	0.33	0.00–4.5	−0.74	1.41	1.00	0.00–4.5	−1.44	3.24	3.00	0.83–5.5	−2.20
Library	1.48	1.50	0.00–4.3	−0.99	2.58	2.50	0.50–4.5	−1.05	3.70	3.83	1.0–5.0	−2.21
Party	0.12	0.00	0.00–0.83	−0.37	0.23	0.17	0.00–1.8	−1.36	1.54	1.33	0.00–4.7	−1.51
Volume (mm3)
Entorhinal cortex	3,926	3,927	2,821–5,203	0.71	3,469	3,397	2,084–4,597	1.38	2,544	2,574	1,615–3,721	2.18
Hippocampus	7,526	7,528	5,836–9,056	1.18	6,491	6,316	5,001–8,403	0.99	5,671	5,685	4,730–6,734	2.71
Parahippocampal gyrus	3,662	3,645	2,814–4,693	0.34	3,478	3,473	2,052–4,542	0.87	2,987	2,965	1,871–3,846	1.38
DLPFC	27,294	27,304	23,511–32,853	0.46	25,951	25,467	19,441–31,890	−0.15	26,382	26,385	22,659–32,247	0.35

Note: CDR = Clinical Dementia Rating scale (Morris, 1993); DLPFC = dorsolateral prefrontal cortex.

^aThe effect size between the two indicated CDR groups was calculated using Cohen's d