Remote, Smartphone App-Based Assessment of Normal and Dual Task Walking in Healthy Younger and Older Adults

Yu, Wanting; Zhu, Hao; Lo, On‐Yee; Zhou, Junhong; Harrison, R.; Lipsitz, Lewis A.; Pascual-Leone, A.; Manor, Brad

doi:10.1093/geroni/igy023.2698

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“…Our validation process also factored in statistical adjustments for different types of pants (tight, medium, or loose) and settings (laboratory or home), ensuring the App’s gait measurements remained accurate despite pocket tightness variations and environmental differences [ 14 ]. The smartphone App has also been tested on various older adults to ensure its usability across a wide range of technological proficiencies [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ]. Moreover, previous studies suggest that older adults are interested in and willing to use smartphones to assist in the management of health [ 23 , 24 , 25 ].…”

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confidence: 99%

Validity and Reliability of a Smartphone Application for Home Measurement of Four-Meter Gait Speed in Older Adults

Lee,

DuMontier,

et al. 2024

Bioengineering

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The four-meter gait speed (4MGS) is a recommended physical performance test in older adults but is challenging to implement clinically. We developed a smartphone application (App) with a four-meter ribbon for remote 4MGS testing at home. This study aimed to assess the validity and reliability of this smartphone App-based assessment of the home 4MGS. We assessed the validity of the smartphone App by comparing it against a gold standard video assessment of the 4MGS conducted by study staff visiting community-dwelling older adults and against the stopwatch-based measurement. Moreover, we assessed the test–retest reliability in two supervised sessions and three additional sessions performed by the participants independently, without staff supervision. The 4MGS measured by the smartphone App was highly correlated with video-based 4MGS (r = 0.94), with minimal differences (mean = 0.07 m/s, ± 1.96 SD = 0.12) across a range of gait speeds. The test–retest reliability for the smartphone App 4MGS was high (ICC values: 0.75 to 0.93). The home 4MGS in older adults can be measured accurately and reliably using a smartphone in the pants pocket and a four-meter strip of ribbon. Leveraging existing technology carried by a significant portion of the older adult population could overcome barriers in busy clinical settings for this well-established objective mobility test.

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