Table 3.

Descriptive characteristics of the ROS/MAP biological replication cohort (N = 160).

Characteristic	N	Percentage
Sex (female)	111	69.4
Diagnosis rendered at death
Normal cognition	50	31.3
Mild cognitive impairment	50	31.2
Alzheimer dementia	60	37.5
Study
ROS	18	11.3
MAP	142	88.7
	Mean [SD]	Median	Range
Age at enrollment	82.0 [6.4]	81.9	[66–97]
Age at death	90.3 [6.2]	90.3	[71–104]
Education	14.9 [3.2]	15.0	[4–25]
Depression score (average over all follow-up years)a	1.4 [1.4]	1.0	[0–8]
Number of follow-up years	6.3 [4.4]	6.0	[0–19]
Postmortem interval (PMI)	9.2 [5.7]	7.3	[2.3–38.3]
RNA integrity number (RIN)	5.4 [1.5]	5.4	[2.1–8.1]

^aCES-D has a possible score range of 0 to 10; higher scores indicate greater depressive symptoms