What is the clinical evidence from this study?

Study design: Cross-Sectional. Population: Healthy aging (n=179). Intervention: Fitbit Flex2 monitoring vs. Self-report physical activity questionnaires (PASE, CHAMPS-MET). Primary outcome: Convergent validity of physical activity measures with cardiometabolic, cognitive, and brain structural outcomes.

August 31, 2022Frontiers in Digital HealthOpen Access

Physical activity measurement in older adults: Wearables versus self-report

Q: What does this research mean for the field?

Objective physical activity measurement via wearable devices demonstrates greater construct validity and more consistent convergence with cardiometabolic, cognitive, and brain volume outcomes than self-report measures in older adults, with poorer cognitive status contributing to self-report overreporting. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.SUPPORTS_CONSENSUS.

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Key result

Objective physical activity measurement via Fitbit demonstrated greater construct validity and more consistent convergence with cardiometabolic, cognitive, and brain volume outcomes than self-report measures in older adults.

Why the study?

Commercial-grade wearable monitors are less well validated in older adults, while widely used self-report physical activity questionnaires have inherent limitations.

Population

179 older adults

Comparison

Objective Fitbit Flex2 monitoring vs self-reported physical activity (PASE and CHAMPS-METs)

Design

Observational comparative study

Follow-up

30-day

Authors

AVAnna M. VandeBunteUniversity of California, San Francisco EGEva Q. GontrumUniversity of Florida Health LGLauren GoldbergerUniversity of California System

Discussion

Member takes

Implication

Supports objective wearables for research on activity-outcome links in older adults; leaves open any change to clinical assessment.

Study Design

Type

Cross-Sectional (n=179)

Multicenter

Structured PICO

Population

179 older adults enrolled in the UCSF Memory and Aging Center’s Longitudinal Aging Study, mean age 73.5, 58.66% female. Inclusion criteria: no current evidence of a memory or neurological condition, no functional decline (CDR 0-0.5), no history of major psychiatric disorders, active substance abuse, hepatitis C, blindness, deafness, HIV, and syphilis.

Intervention

30-day Fitbit Flex2™ monitoring (average daily steps and calories burned) and self-reported physical activity levels via PASE and CHAMPS-MET questionnaires.

Outcome

Discrepancy between objective Fitbit monitoring and self-reported PA (sample-based z difference score) and convergent validity with cardiometabolic, cognitive, and brain MRI outcomes.surrogate

Wearable digital health indicators of physical activity demonstrate greater construct validity than self-report questionnaires in older adults.

Limitations

Wearing a Fitbit may have increased participants' motivation to move
Sample was not representative of the general population (85% White)
Relatively small sample size
High educational attainment of the cohort limits generalizability
Slight gap in time between obtaining self-report data and gathering metrics from Fitbit monitors
Lack of other gold-standard objective measures of physical activity and fitness (e.g., 6-min walk or research-grade accelerometer)
Cross-sectional design limits understanding of reliability over time

Cite This Study

VandeBunte et al. (2022) conducted a cross-sectional in Healthy aging (n=179). Fitbit Flex2 monitoring vs. Self-report physical activity questionnaires (PASE, CHAMPS-MET) was evaluated on Convergent validity of physical activity measures with cardiometabolic, cognitive, and brain structural outcomes. Objective physical activity measurement via Fitbit demonstrated greater construct validity and more consistent convergence with cardiometabolic, cognitive, and brain volume outcomes than self-report measures in older adults.

synapsesocial.com/papers/6a1d9c807328fa9a742fc146 https://doi.org/10.3389/fdgth.2022.869790

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Physical activity measurement in older adults: Wearables versus self-report

Discussion

Member takes

Implication

Study Design

Structured PICO

Limitations

Cite This Study

Physical activity measurement in older adults: Wearables versus self-report

Discussion

Member takes

Implication

Study Design

Structured PICO

Limitations

Cite This Study

Also Consider

Also Consider