Fig. 2

Location and concentration of Houston-3H Study participants in the Houston metro area, Harris County, Texas. ** We used the “Near” tool in ArcGIS Pro 2.1 to measure the Euclidean distance from each participant’s address to the nearest “original neighborhood” centroid (center). After visual inspection of address clustering around the centroid, a 7.5-mile radius was used as the cutoff for the “customized neighborhood boundary.” Most participants (n = 303) lived inside the customized neighborhood boundaries. Those who lived outside the customized neighborhoods were assembled into an “Others” group (n = 44)