Table 2.

Subject Information for Total Sample Population, Training Set, and Testing Set

	Total	Train	Test
Number of subjects	103	50	53
Age
Mean	61.2	61.6	60.8
Standard deviation	10.2	10.4	10.1
Sex
Male	53	25	28
Female	50	25	25
Ethnicity
Caucasian	85	40	45
African American	16	10	6
Asian	1	0	1
Other non-white	1	0	1
KL grade
0	11	6	5
1	19	10	9
2	34	15	19
3	35	17	18
4	4	2	2