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    Validation of the activPAL3 activity monitor in people moderately affected by Multiple Sclerosis

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    eResearch%204691%20aam.pdf (393.0Kb)
    eResearch%204691.pdf (340.8Kb)
    Date
    2017-04-10
    Author
    Coulter, Elaine H.
    Miller, Linda
    McCorkell, Sara
    McGuire, Caroline
    Algie, Kimberley
    Freeman, Jenny
    Weller, Belinda
    Mattison, Paul
    McConnachie, Alex
    Wu, Olivia
    Paul, Lorna
    Metadata
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    Citation
    Coulter, E., Miller, L., McCorkell, S., McGuire, C., Algie, K., Freeman, J., Weller, B., Mattison, P., McConnachie, A., Wu, O. & Paul, L. (2017) Validation of the activPAL3 activity monitor in people moderately affected by Multiple Sclerosis, Medical Engineering and Physics, , , ,
    Abstract
    Background: Walking is the primary form of physical activity performed by people with Multiple Sclerosis (MS), therefore it is important to ensure the validity of tools employed to measure walking activity. The aim of this study was to assess the criterion validity of the activPAL3 activity monitor during overground walking in people with MS. Methods: Validity of the activPAL3 accelerometer was compared to video observation in 20 people moderately affected by MS. Participants walked 20-30m twice along a straight quiet corridor at a comfortable speed. Results: Inter-rater reliability of video observations was excellent (all intraclass correlations > 0.99). The mean difference (activPAL3- mean of raters) was -4.70 ± 9.09, -4.55 s ± 10.76 and 1.11 s ± 1.11 for steps taken, walking duration and upright duration respectively. These differences represented 8.7, 10.0 and 1.8% of the mean for each measure respectively. The activPAL3 tended to underestimate steps taken and walking duration in those who walked at cadences of ≤ 38 steps/minute by 60% and 47% respectively. Discussion: The activPAL3 is valid for measuring walking activity in people moderately affected by MS. It is accurate for upright duration regardless of cadence. In participants with slow walking cadences, outcomes of steps taken and walking duration should be interpreted with caution.
    Official URL
    http://doi.org/10.1016/j.medengphy.2017.03.008
    URI
    https://eresearch.qmu.ac.uk/handle/20.500.12289/4691
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