Skip to main content
. Author manuscript; available in PMC: 2020 Apr 1.
Published in final edited form as: J Aging Phys Act. 2018 Nov 21;27(2):222–229. doi: 10.1123/japa.2018-0036

Table 3.

Percentage Accuracy of Activity Monitors Stratified by Assistive Device Use

Activity Monitor Did Not Use Assistive Device Used Assistive Device
Mean gait speed = 0.98 m/s Mean gait speed = 0.70 m/s
n = 22 n = 21
Wrist-worn monitors
 Fitbit Charge 64.12 (33.04) 12.93 (29.27)
 Garmin Vivofit 93.82 (8.23) 18.33 (37.62)
Shirt-worn monitors
 Fitbit Zip 84.19 (30.07) 54.73 (44.77)
Waist-worn monitors
 Fitbit Zip 89.56 (21.82) 60.26 (41.16)
 Digiwalker Pedometer 74.03 (30.53) 30.61 (31.58)
 Accusplit Accelerometer Pedometer 97.15 (7.44) 90.04 (17.98)
 Omron Pedometer 88.35 (24.43) 58.99 (42.11)
 Yamax EX-510 Pedometer 95.23 (8.00) 52.48 (36.47)

Note. Accuracy was defined as monitor steps/observed steps × 100 with 100% indicating perfect accuracy. Bolded value is ≥97% accurate. Data are represented as M (SD).