Validation of Objective Measures of Place-Based Physical Activity

Sponsor

University of California, San Diego (Other)

Overall Status

Completed

CT.gov ID

NCT01886261

Collaborator

San Diego State University (Other), National Cancer Institute (NCI) (NIH)

144

Enrollment

Location

Duration (Months)

4.5

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

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	Intervention/Treatment	Phase
Physical Activity

Detailed Description

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 Design

Study Type:

Observational

Actual Enrollment :

144 participants

Observational Model:

Cohort

Time Perspective:

Prospective

Official Title:

Validation of Objective Measures of Place-Based Physical Activity

Study Start Date :

Sep 1, 2011

Actual Primary Completion Date :

May 1, 2014

Actual Study Completion Date :

May 1, 2014

Outcome Measures

Primary Outcome Measures

Construct Validity [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 [1 day]
Direct observation of research staff with no experience using the PALMS system.
Added Value [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.

Eligibility Criteria

Criteria

Ages Eligible for Study:

18 Years and Older

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Yes

Validation Study

Inclusion Criteria:

Adults (18+ years old)
Self-identify as Hispanic/Latino(a)
Have a variety of primary transportation modes
Have a variety of physical activity levels both occupational and leisure
Commute different distances to the location

Exclusion Criteria:

Illness that prevents normal activities
Inability to ambulate
Unable to wear the devices for up to 7 days
Unable to complete two phone interviews in English or Spanish
Unable to complete a written survey in English or Spanish

Usability Testing:

Research staff members of the SDSU Fe en Accion research study.

Added Value Cohort: Fe en Accion

Inclusion Criteria (Participants of the cohort):

Attend church weekly
Age: 18 - 65 years old
Must live in San Diego County
Live within 4 miles of their church
engage in less than 150 minutes of leisure time moderate and vigorous physical activity
Latina woman