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medRxiv PreprintsInternational30 October 2026

Wearable-derived daily steps and first recorded cardiovascular diagnoses: outpatient and acute care in All of Us

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Wearable-derived daily step counts are associated with cardiovascular health, but associations with the setting of cardiovascular disease (CVD) recording are less clear. We conducted a retrospective landmark cohort study using linked Fitbit, survey, and electronic health record data from the All of Us Research Program. Steps were averaged over the year before baseline. Eligibility required post-baseline sleep coverage and survey completeness, and classifiable pre-baseline smoking and drinking information; former smokers were excluded. After excluding participants with primary or secondary CVD
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