Validation of Two Activity Monitors in Slow and Fast Walking Hospitalized Patients
Table 9
Relative and absolute reliability of steps, walking, and sedentary time assessed with ActivPAL3™, SENS motion®, and direct observations in patients following acute high-risk abdominal surgery ().
Comparison
Mean (SD) of both assessments (sec)
Mean (SD) difference (sec)
value for difference
ICC2.1 (95% CI)
SEM (SEM%)
MDC95 (MDC%)
Steps
ActivPAL vs. observed
197.5 (80.2)
-88.1 (52.3)
<0.001
0.529 (-0.105-0.868)
55.0 (28)
152.5 (77)
SENS vs. observed
206.9 (75.3)
-69.4 (32.3)
<0.001
0.653 (-0.075-0.920)
44.4 (21)
123.0 (59)
ActivPAL vs. SENS
162.8 (87.5)
-18.7 (33.2)
0.09
0.916 (0.699-0.977)
25.4 (16)
70.4 (43)
Walking time
ActivPAL vs. observed
138.7 (38.1)
-64.2 (51.7)
0.002
0.193 (-0.135-0.612)
34.2 (25)
94.8 (68)
SENS vs. observed
158.9 (20.4)
-23.9 (18.0)
0.001
0.435 (-0.121-0.812)
15.3 (10)
42.4 (27)
ActivPAL vs. SENS
126.7 (34.9)
-40.4 (57.6)
0.042
0.143 (-0.264-0.610)
32.3 (25)
89.5 (71)
Sedentary time
ActivPAL vs. observed
195.9 (21.8)
-9.8 (13.8)
0.040
0.760 (0.263-0.932)
10.7 (5)
29.7 (15)
SENS vs. observed
196.5 (21.6)
-8.6 (9.4)
0.012
0.853 (0.309-0.964)
8.3 (4)
22.2 (11)
ActivPAL vs. SENS
191.6 (23.9)
-1.2 (14.7)
0.8
0.840 (0.506-0.954)
9.6 (5)
26.6 (14)
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®.
