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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