Validation of Two Activity Monitors in Slow and Fast Walking Hospitalized Patients
Table 6
Relative and absolute reliability of walking and sedentary time in seconds, assessed with ActivPAL3™, SENS motion®, and direct observations.
Comparison
Mean (SD) of both assessments (sec)
Mean (SD) difference (sec)
value for difference
ICC2.1 (95% CI)
SEM (SEM%)
MDC95 (MDC%)
Walking time
ActivPAL vs. observed
146.6 (38.6)
-72.4 (68.5)
<0.001
0.059 (-0.104-0.272)
37.4 (26)
80.9 (55)
SENS vs. observed
170.0 (37.6)
-25.5 (25.7)
<0.001
0.660 (0.079-0.863)
21.9 (13)
60.7 (36)
ActivPAL vs. SENS
133.8 (40.3)
-46.9 (58.1)
<0.001
0.222 (-0.069-0.496)
35.5 (27)
98.4 (74)
Sedentary time
ActivPAL vs. observed
192.3 (15.8)
-5.9 (11.0)
0.003
0.740 (0.479-0.870)
8.1 (4)
22.5 (12)
SENS vs. observed
190.8 (15.4)
-8.9 (9.6)
<0.001
0.718 (0.179-0.888)
8.2 (4)
22.7 (12)
ActivPAL vs. SENS
187.9 (17.4)
3.0 (12.2)
0.159
0.776 (0.601-0.880)
8.2 (4)
22.7 (12)
ICC: intraclass correlation coefficient; SEM: standard error of measurement (); MDC: minimal detectable change (,). SEM and MDC indicate measurement error (in sec) at group and individual levels, respectively. ActivPAL: ActivPAL3™ monitor; SENS: SENS motion®.
