Validity of an Accelerometer-Based Activity Monitor System for Measuring Physical Activity in Frail Older Adults

Anne M Hollewand, Anouk G Spijkerman, Henk J Bilo, Nanne Kleefstra, Yvo Kamsma, Kornelis J van Hateren

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    12 Citations (Scopus)

    Abstract

    This study aimed to investigate the validity of the accelerometer-based DynaPort system to detect physical activity in frail elderly subjects. Eighteen home-dwelling subjects (Groningen Frailty Indicator (GFI) score ≥4, ≥75 years) were included. Activities in their home environment were simultaneously observed by two researchers and measured with the DynaPort system during six consecutive hours. Primary outcome measures were the sensitivity and specificity of the DynaPort for locomotion (90% considered as sufficient agreement). Other outcome measures were overall agreement, and sensitivity and specificity for other activities. Sensitivity and specificity for locomotion were 83.3% and 100.0%, respectively. Overall agreement was 74.6%. Sensitivity was sufficient for sitting (94.4%), but not for lying and standing (59.2% and 69.6%, respectively). Specificity was sufficient for lying and standing (100.0% and 93.3%, respectively), but not for sitting (80.7%). In conclusion, the DynaPort system is not a valid method for assessing physical activity in frail elderly subjects.

    Original languageEnglish
    Pages (from-to)555-558
    Number of pages4
    JournalJOURNAL OF AGING AND PHYSICAL ACTIVITY
    Volume24
    Issue number4
    DOIs
    Publication statusPublished - Oct-2016

    Keywords

    • frailty
    • aging
    • daily activities
    • home environment
    • accurate detection
    • VALIDATION

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