Table 1.

Overall Participant Characteristics and by Daily Physical Activity

	Overall (n = 301)	High Daily Active Minutes (n = 100)	Medium Daily Active Minutes (n = 100)	Low Daily Active Minutes (n = 101)	p Value for Trend
Age in years, mean (SD)	77.2 (7.2)	75.5 (7.2)	77.9 (7.1)	78.1 (6.9)	.01
Women, n (%)	177 (58.8)	69 (69.0)	65 (65.0)	43 (42.6)	<.001
Black, n (%)	64 (21.3)	27 (27.0)	21 (21.0)	16 (5.8)	.07
Years of education, mean (SD)	17.1 (2.5)	16.9 (2.5)	17.3 (2.6)	17.2 (2.4)	.38
Body mass index, kg/m2, n (%)	27.0 (4.6)	27.1 (4.7)	26.3 (4.4)	27.7 (4.7)	.37
No. of morbid conditions, n (%)	2.5 (1.3)	2.5 (1.2)	2.3 (1.2)	2.5 (1.5)	.98
0	16 (5.3)	2 (2.0)	8 (8.0)	6 (5.9)	.16
1	52 (17.3)	17 (17.0)	16 (16.0)	19 (18.8)	.87
2 or more	233 (77.4)	81 (81.0)	76 (76.0)	76 (75.3)	.57
Hypertension, n (%)	143 (47.5)	56 (56.0)	41 (41.0)	46 (45.5)	.09
Stroke or TIA, n (%)	20 (6.6)	5 (5.0)	6 (6.0)	9 (8.9)	.51
Cardiovascular disease, n (%)	33 (11.0)	4 (4.0)	13 (13.0)	16 (15.8)	.02
Hyperlipidemia, n (%)	187 (62.1)	63 (63.0)	59 (59.0)	65 (64.4)	.72
Pulmonary disease, n (%)	32 (10.6)	9 (9.0)	8 (8.0)	15 (14.9)	.23
Diabetes, n (%)	49 (16.3)	23 (23.0)	8 (8.0)	18 (17.8)	.01
Cancer, n (%)	100 (33.2)	29 (29.0)	32 (32.0)	39 (38.6)	.33
Osteoarthritis, n (%)	175 (58.1)	65 (65.0)	61 (61.0)	49 (48.5)	.05
MMSE score ranging from 0 to 30, mean (SD)	28.5 (1.3)	28.6 (1.4)	28.5 (1.4)	28.5 (1.3)	.64
CES-D score ranging from 0 to 25, mean (SD)	4.7 (4.6)	4.9 (4.5)	4.2 (4.1)	5.0 (5.1)	.76
Usual gait speed, m/s, mean (SD)	1.1 (0.2)	1.1 (0.2)	1.1 (0.2)	1.1 (0.2)	.48
Apolipoprotein E e4 risk allele, n (%)	71 (23.6)	23 (23.0)	20 (20.0)	28 (27.7)	.43
Intracranial volume, cc, mean (SD)	1389.6 (132.1)	1360.1 (129.6)	1375.5 (118.3)	1432.8 (137.6)	<.001

Notes: TIA = transient ischemic attack; MMSE = Mini-Mental State Examination where higher scores represent the higher cognitive mental state (51) (n = 298); CES-D = Center for Epidemiological Studies-Depression where higher scores represent higher depressive-like symptoms (27).