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

ABSTRACT:

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. Resea

SUBMITTER: Senso MM 

PROVIDER: S-EPMC4104794 | biostudies-literature | 2014 Mar

REPOSITORIES: biostudies-literature