Table 3. Prevalence of Gray Matter Loss in the Medial Temporal Lobe, Intracranial and Carotid Artery Stenosis, and Atherosclerosis of the Ascending Aorta.

	POCD n = 8	No POCD n = 20	p Value
Gray matter loss of MTL (Z score)	2.0±0.9	1.1±0.9	0.027
Hardly any gray matter loss	1 (12)	13 (65)	0.044
Some gray matter loss	3 (38)	4 (20)
Considerable gray matter loss	3 (38)	1 (5)
Prominent gray matter loss	1 (12)	2 (10)
MRI (White matter lesion)
Absence	3 (38)	9 (45)	0.028
Punctate foci	0	6 (30)
Beginning confluence of foci	1 (12)	4 (20)
Large confluent areas	4 (50)	1 (5)
MRI (brain)
No infarcts	4 (50)	17 (85)	0.149
Single infarct	1 (12)	1 (5)
Multiple infarcts, single location	3 (38)	2 (10)
Multiple infarcts, multiple location	0	0
MRA (carotid arteries)
Normal or mild	8 (100)	19 (95)	1.000
Moderate	0	0
Severe	0	1 (5)
MRA (cerebral arteries)
Normal or mild	8 (100)	19 (95)	1.000
Moderate	0	1 (5)
Severe	0	0
Aortic atherosclerosis
Normal or mild	5 (63)	17 (85)	0.424
Moderate	1 (12)	1 (5)
Severe	2 (25)	2 (10)

MTL  =  medial temporal lobe; MRI  =  magnetic resonance imaging; MRA  =  magnetic resonance angiography.