Self-reported activity and accelerometry in 2 behavior-maintenance trials

Meghan M. Senso, Christopher P. Anderson, A. Lauren Crain, Nancy E. Sherwood, Brian C. Martinson

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Objectives: To compare between accelerometry (MVPA-A) and self-reported activity (MVPA-SR) in activity-maintenance (Keep Active Minnesota; KAM) and weight loss-maintenance (Keep It Off; KIO) trials. Methods: Linear regression estimated moderation of study, treatment, or time on MVPA-A and MVPA- SR associations. Results: MVPA-A was similar between studies (KAM 119 minutes, KIO 112 minutes, p = .555), whereas MVPA-SR differed significantly (KAM 350 minutes, KIO 87 minutes, p < .0001). Only study moderated correlation between MVPA-A and MVPA-SR. MVPA- SR better predicted MVPA-A in KIO relative to KAM (p = .023). Conclusions: Results suggest that self-presentation bias may influence validity of self-report in intervention studies with activity as a primary outcome. Researchers should select self-report to assess activity dimensions that objective measures capture poorly.

Original languageEnglish (US)
Pages (from-to)254-264
Number of pages11
JournalAmerican journal of health behavior
Issue number2
StatePublished - Mar 2014


  • Behavioral intervention
  • Bias
  • Objective monitoring


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