How many days are needed? Measurement reliability of wearable device data to assess physical activity

• Patrick Hilden,

  Roles Conceptualization, Data curation, Formal analysis, Methodology, Software, Visualization, Writing – original draft, Writing – review & editing

  Affiliation Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, New York, United States of America

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• Joseph E. Schwartz,

  Roles Conceptualization, Data curation, Methodology, Visualization, Writing – review & editing

  Affiliations Center for Behavioral Cardiovascular Health, Department of Medicine, Columbia University Irving Medical Center, New York, NY, United States of America, Department of Psychiatry and Behavioral Sciences, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, United States of America

  https://orcid.org/0000-0002-8944-3566

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• Christian Pascual,

  Roles Data curation, Formal analysis, Visualization, Writing – review & editing

  Affiliation Department of Biostatistics, Herbert Wertheim School of Public Health, University of California, San Diego, San Diego, CA, United States of America

  https://orcid.org/0000-0002-9968-9420

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• Keith M. Diaz,

  Roles Conceptualization, Data curation, Methodology, Writing – review & editing

  Affiliation Center for Behavioral Cardiovascular Health, Department of Medicine, Columbia University Irving Medical Center, New York, NY, United States of America

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• Jeff Goldsmith

  Roles Conceptualization, Data curation, Investigation, Methodology, Supervision, Visualization, Writing – original draft, Writing – review & editing

  * E-mail: jeff.goldsmith@columbia.edu

  Affiliation Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, New York, United States of America

  https://orcid.org/0000-0002-6150-8997

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