Validation of Two Activity Monitors in Slow and Fast Walking Hospitalized Patients

Britt Stævnsbo Pedersen, Morten Tange Kristensen, Christian Ohrhammer Josefsen, Kasper Lundberg Lykkegaard, Line Rokkedal Jønsson, Mette Merete Pedersen, Britt Stævnsbo Pedersen, Morten Tange Kristensen, Christian Ohrhammer Josefsen, Kasper Lundberg Lykkegaard, Line Rokkedal Jønsson, Mette Merete Pedersen

Abstract

To evaluate interventions to promote physical activity, valid outcome measures are important. This study evaluated the validity and reliability of the ActivPAL3™ and the SENS motion® activity monitors with regard to the number of steps taken, walking, and sedentary behavior in hospitalized patients (n = 36) (older medical patients (+65 years) (n = 12), older patients (+65) with acute hip fracture (n = 12), and patients (+18) who underwent acute high-risk abdominal surgery (n = 12)). Both monitors showed good (≥60%) percentage agreement with direct observation for standing and no. of steps (all gait speeds) and high agreement (≥80%) for lying. For walking, ActivPAL3™ showed moderate percentage agreement, whereas SENS motion® reached high percentage agreement. The relative reliability was moderate for sedentary behavior for both monitors. The ActivPAL3™ showed poor (walking) to moderate (steps) reliability for walking and steps, whereas SENS motion® showed moderate reliability for both activities. For slow walkers, the relative reliability was moderate for SENS motion® and poor for ActivPAL3™. This trial is registered with the ClinicalTrials.gov identifier NCT04120740.

Conflict of interest statement

BSP, MTK, COJ, LRJ, and MMP have no conflicts of interest. KLL is the founder of SENS Innovation ApS that produces SENS motion®. Therefore, KLL did not participate in the planning of the study, the assessment of patients, or the analysis and interpretation of data.

Copyright © 2022 Britt Stævnsbo Pedersen et al.

Figures

Figure 1
Figure 1
(a–c) Recording of steps: comparison between ActivPAL3™ and direct observations.
Figure 2
Figure 2
(a–c) Recording of steps: comparison between SENS motion® and direct observations.
Figure 3
Figure 3
(a–c) Recording of steps: comparison between ActivPAL3™ and SENS motion®.
Figure 4
Figure 4
(a–c) Recording of walking time: comparison between ActivPAL3™, SENS motion®, and direct observations.
Figure 5
Figure 5
(a–c) Recording of sedentary time: comparison between ActivPAL3™, SENS motion®, and direct observations.

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