Table 1.

PRIMA Analytic Sample Characteristics

Characteristics	M ± SD or n (%)	Min.	Max.
Age	77.1 ± 6.5	65	97
Female sex	101 (68)
White race	128 (86)
>High school education	123 (83)
Device: iBlue (vs V990)	143 (96)
Season
Winter	28 (19)
Spring	30 (20)
Summer	43 (29)
Fall	48 (32)

Clinical measures	M ± SD or n (%)	Min.	Max.
Comorbidity domains affected	2.8 ± 1.3	0	6
3MS	96.3 ± 3.8	80	100
Time on TMT-A (s)	33.4 ± 12.9	15.3	90.0
Time on TMT-B (s)*	82.0 ± 42.2	33.2	300.0
Distance on 6-Minute Walk Test (m)	402.2 ± 88.2	187.8	617.1
Time on Figure-of-8 Walk (s)	9.9 ± 2.2	5.0	20.3
Gait speed (14-feet, m/s)	1.1 ± 0.2	0.7	1.4
Depressive symptoms (GDS)	1.0 ± 1.4	0	7

Community mobility measures	Median (IQR)	Min.	Max.
Activity space (km2)
SDE area, median	2.2 (0.4, 5.5)	0.0	1 185.4
Activity shape
SDE compactness, median	0.7 (0.6, 0.8)	0.4	1.0
Activity duration
Total time out-of-home (hours)	24.2 (16.1, 34.2)	0.0	83.9
Total time out-of-home (%)	16.2 (11.6, 23.8)	0.0	61.8
Median time out-of-home (hours)	3.3 (2.0, 4.8)	0.0	10.5
Median time out-of-home (%)	15.2 (9.9, 22.8)	0.0	57.6
Activity distance (km)
Maximum distance, overall	14.2 (9.4, 22.1)	0.1	936.2
Maximum distance, median	5.1 (2.9, 8.1)	0.0	137.6
Daily GPS hours recorded, median	24.0 (22.6, 24.0)	8.3	24.0

Notes: n = 149; PRIMA = program to improve mobility in aging; SD = standard deviation; GDS = geriatric depression scale; TMT-A = Trail Making Test, Part A; TMT-B = Trail Making Test, Part B; 3MS = Modified Mini-Mental State examination; SDE = standard deviational ellipse; IQR = interquartile range; GPS = global positioning system.

*n = 147; excluded 2 participants with invalid completion times on TMT-B.