Table 1. Subject and MRI Characteristics.

In A, the ages and CHS white matter scores of subjects with pre and postmortem MRI scans are shown. Age at death and age at last MRI were significantly different in the pre and postmortem MRI groups (ANOVA) while the CHS score was not. The total number of subjects with scans (50) is less than the sum of the pre and postmortem MRI’s (55) because 5 subjects had both (only the postmortem scans were used for subsequent analyses). In B, the CHS white matter scores of the 5 subjects with both pre and postmortem MRI scans are shown along with the interval from the last premortem scan until death. WM= White Matter.

A	Subjects	Age at Last MRI	Age at Death	CHS WM Score
	Total (n=50)	87.7 +/- 6.0	88.6 +/- 5.8	4.0 +/- 1.9
	Premortem MRI (n=24)	84.4 +/- 5.4	86.1 +/- 5.6	4.1 +/- 1.9
	Postmortem MRI (n=31)	90.0 +/- 5.3	90.0 +/- 5.3	4.0 +/- 2.0
B	Subject	Premortem CHS WM Score	Postmortem CHS WM Score	Interval
	#1	3	4	38 months
	#2	3	2	14 months
	#3	7	7	45 months
	#4	2	1	11 months
	#5	8	8	16 months