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Table 1 Summary of Data Collection for Study Population Sub-groups

From: The Health and economic effects of light rail lines: design, methods, and protocol for a natural experiment

 

Study Groups

Data Source and Measurement

 

Overall Cohort

Behavioral Cohort

Environmental Data

KP EMR

Measurement Method and/or Time Frame

OUTCOME MEASURES

    

All 3 years pre- and post-light rail transit (LRT)

Medical Care Costs

X

  

X

 

Body Mass Index

X

  

X

 

Blood pressure

X

  

X

 

Laboratory Data (lipids, HgbA1c)

X

  

X

 

INDIVIDUAL COVARIATES

Age, sex

X

  

X

 

Race, ethnicity

X

  

X

 

Smoking, alcohol use

X

  

X

 

Chronic disease/co-morbidities (diagnoses)

X

  

X

Charlson Index [44], 3 years pre- and post- LRT

Medication use

X

  

X

3 years pre- and post- LRT

TRANSPORTATION AND NEIGHBORHOOD PERCEPTIONS SURVEY VARIABLES

*

   

All baseline and 1-year post-LRT

Race/ethnicity details, income, education

*

X

  

Census Items

Functional Status

*

X

  

10-item scale from PROMIS [45, 46]

Duration of residence prior to enrollment

*

X

  

Prior 3 addresses

Residential Preference

*

X

  

MetroAtlanta Pref Survey

Perceived Walkability

*

X

   

Transportation Use

*

X

   

Household Environment

*

X

  

Occupants, exercise equipment, pets

Worksite Environment

*

X

  

Address, exercise promotion [49, 50]†

PHYSICAL ACTIVITY AND TRANSPORTATION MEASURES

    

At baseline and 1-year post-LRT

Accelerometry

 

X

  

7-Day Actigraph® GT3X+,

GPS tracking

 

X

  

7-day BT Q1000XT GPS

Travel Diary

 

X

  

7-day Modified 2009 NTHS [54]

BUILT ENVIRONMENT VARIABLES

     

Neighborhood walkability

 

X

X

  

Regional transportation accessibility*

 

X

X

  

Pedestrian Landscape

 

X

X

 

MAPS tool [66]

Park Access

 

X

X

  
  1. NOTE: Participants in the behavioral cohort are included in the overall cohort
  2. *For a subset of the overall cohort