A comparison of accelerometer cut-points among individuals with coronary artery disease

Stephanie A. Prince, Jennifer L. Reed, Amy E. Mark, Christopher M. Blanchard, Sherry L. Grace, Robert D. Reid, James P. Brody

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Background: Accurate assessment of physical activity among coronary artery disease patients is important for assessing adherence to interventions. The study compared moderate-to-vigorous physical intensity activity and relationships with cardiometabolic health/fitness indicators using accelerometer cut-points developed for coronary artery disease patients versus those developed in younger and middle-aged adults. Methods: A total of 231 adults with coronary artery disease wore an Actigraph GT3X accelerometer for ≥4 days (≥10 hours/day). Moderate-to-vigorous intensity physical activity between cut-points was compared using Bland-Altman analyses. Partial spearman correlations assessed relationships between moderate-to-vigorous intensity physical activity from each cut-point with markers of cardiometabolic health and fitness while controlling for age and sex. Results: Average time spent in bouts of moderate-to-vigorous intensity physical activity using coronary artery disease cut-points was significantly higher than the young (mean difference: 13.0±12.8 minutes/day) or middle-aged (17.0±15.2 minutes/day) cut-points. Young and middle-aged cut-points were more strongly correlated with body mass index, waist circumference and systolic blood pressure, while coronary artery disease cut-points had stronger relationships with triglycerides, high-density and low-density lipoproteins. All were similarly correlated with measures of fitness. Conclusion: Researchers need to exert caution when deciding on which cut-points to apply to their population. Further work is needed to validate which cut-points provide a true reflection of moderate-to-vigorous intensity physical activity and to examine relationships among patients with varying fitness.

Original languageEnglish
Article numbere0137759
JournalPLoS One
Volume10
Issue number9
DOIs
Publication statusPublished - Sept 11 2015

Bibliographical note

Publisher Copyright:
© 2015 Prince et al.

ASJC Scopus Subject Areas

  • General Biochemistry,Genetics and Molecular Biology
  • General Agricultural and Biological Sciences
  • General

PubMed: MeSH publication types

  • Journal Article
  • Research Support, Non-U.S. Gov't

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Prince, S. A., Reed, J. L., Mark, A. E., Blanchard, C. M., Grace, S. L., Reid, R. D., & Brody, J. P. (2015). A comparison of accelerometer cut-points among individuals with coronary artery disease. PLoS One, 10(9), Article e0137759. https://doi.org/10.1371/journal.pone.0137759