Measurement error of self-reported physical activity levels in New York City: assessment and correction.

ABSTRACT: Because it is difficult to objectively measure population-level physical activity levels, self-reported measures have been used as a surveillance tool. However, little is known about their validity in populations living in dense urban areas. We aimed to assess the validity of self-reported physical activity data against accelerometer-based measurements among adults living in New York City and to apply a practical tool to adjust for measurement error in complex sample data using a regression calibration method. We used 2 components of data: 1) dual-frame random digit dialing telephone survey data from 3,806 adults in 2010-2011 and 2) accelerometer data from a subsample of 679 survey participants. Self-reported physical activity levels were measured using a version of the Global Physical Act

SUBMITTER: Lim S 

PROVIDER: S-EPMC4481536 | biostudies-literature | 2015 May

REPOSITORIES: biostudies-literature