Table 1.

Participant characteristics (N = 360)

Mean (range)
Age (years)55.3 (22–82)
Momentary exposure to greenness0.52 (0.09–0.83)
Momentary exposure to walkability index0.23 (−1.66–6.30)
Accelerometer CPM562.1 (43.0–2,290.9)
RaceN (%)
 White282 (78.3%)
 Black60 (16.7%)
 Other18 (5.0%)
Educational attainment
 Less than college115 (31.9%)
 College121 (33.6%)
 Graduate degree124 (34.4%)
Employment status
 Full time181 (50.3%)
 Part time81 (22.5%)
 Homemaker, unemployed, unable to work32 (8.9%)
 Retired61 (16.9%)
 Missing or refused to answer5 (1.4%)
Household annual income from all sources
 <$50K83 (23.1%)
 $50–$69K54 (15.0%)
 $70K+165 (45.8%)
 Missing or refused to answer58 (16.1%)
Study site
 Harvard T.H. Chan School of Public Health (Nationwide Study)91 (25.3%)
 University of Pennsylvania (Philadelphia, PA)119 (33.1%)
 University of California, San Diego (San Diego, CA)71 (19.7%)
 Washington University in St. Louis (St. Louis, MO)79 (21.9%)
Sampling season
 Winter107 (29.7%)
 Spring131 (36.4%)
 Summer33 (9.2%)
 Fall89 (24.7%)
  • NOTE: Greenness defined using MODIS normalized difference vegetation index; walkability defined using EPA Smart Location Database information on gross population density, street intersection density, and land use diversity.