Validation of Objective Measures of Place-Based Physical Activity
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|ClinicalTrials.gov Identifier: NCT01886261|
Recruitment Status : Completed
First Posted : June 25, 2013
Last Update Posted : December 5, 2014
Usability of the PALMS system, validity of the PALMS system and added value to an existing cohort study.
Hypothesis: Addition of GPS device and use of PALMS system will allow researchers to better examine place-based interventions.
|Condition or disease|
The Personal Activity Location Measurement System (PALMS) researchers at UCSD have created a web-based processing system for location (GPS) and physical activity (accelerometer) data. We will collect data on a pilot sample of 40 Hispanic persons to a) test the validity of PALMS assessments of transportation modes, and activity in different locations against an objective record of activities derived from images collected by Vicon Revue; b) compare PALMS assessments of transportation modes and activity locations to other self-report measures and interview measures; c) assess the construct validity of PALMS-based activity assessment.
We will be assessing the usability of PALMS in a research staff with no previous experience of using the PALMS system. We will be assessing the added value of using PALMS to examine a place-based intervention in an existing cohort study.
|Study Type :||Observational|
|Actual Enrollment :||144 participants|
|Official Title:||Validation of Objective Measures of Place-Based Physical Activity|
|Study Start Date :||September 2011|
|Actual Primary Completion Date :||May 2014|
|Actual Study Completion Date :||May 2014|
- Construct Validity [ Time Frame: 7 days ]Construct validity assesses the theoretical relationship of a measure (and resulting variables) with other variables. The multitrait-multimethod matrix (MTMM) is a procedure first developed by Campbell and Fiske to asses construct validity by creating a fully crossed method-by-measure matrix of associations among multiple constructs and multiple measurement methods. The resulting matrix of correlation coefficients gives a pattern of associations that informs the validity evidence of the measure and construct. We will use the following measures in the multitrait multimethod matrix: Neighborhood Physical Activity Questionnaire, the American Timeuse Survey, and PALMS based physical activity in location estimates.
- Usability [ Time Frame: 1 day ]Direct observation of research staff with no experience using the PALMS system.
- Added Value [ Time Frame: baseline and 1 year ]We will be assessing GPS tracks in participants in the Fe en Accion cohort to determine the effectiveness of the place-based intervention.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01886261
|United States, California|
|University of California, San Diego|
|La Jolla, California, United States, 92093|
|Principal Investigator:||Kevin Patrick, MD, MS||UCSD|