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Table 1 Description and source of all built environment variables used in the study

From: The role of the built environment in explaining educational inequalities in walking and cycling among adults in the Netherlands

Variable Description Mean (SD) Range Data source
Address density Degree of concentration by number of addresses within a 1 km radius on January 1, 2013 1533 (779.6) 16–3684 Statistics Netherlands [19]
Population density Number of residents per km2 in a neighborhood on January 1, 2013 3999.3 (1904.7) 8–11,151 Statistics Netherlands [19]
Level of mixed use Degree of mixed use of a neighborhood, measured by an entropy measure containing the categories ‘residential’ and ‘other’ in 2013 0.517 (0.203) 0.069–1 Kadaster [41]
Connectivity Number of intersections per km2 in a neighborhood in November 2012 140.2 (51.5) 2–303 Kadaster [42]
Accessibility of facilities Number of facilities within a 1 km radius in 2013. The following facilities were used to calculate this variable (weights between brackets): big supermarkets (10), other daily provisions (5), cafes (1), cafeteria (1), restaurants (1), nurseries (1), out-of-school care (1) and schools (5) 68.9 (61.8) 0–424 Statistics Netherlands [19]
Accessibility of parks Accessibility measure based on the mean distance to a park for all residents of a neighborhood in 2008 0.613 (0.544) 0.1–4.6 Statistics Netherlands [30]
Accessibility of forests Accessibility measure based on the mean distance to a forest for all residents of a neighborhood in 2008 1.078 (0.512) 0.2–2.7 Statistics Netherlands [30]
Accessibility of open natural areas Accessibility measure based on the mean distance to an open natural area for all residents of a neighborhood in 2008 3.197 (1.442) 0.5–6.3 Statistics Netherlands [30]
Accessibility of public green space Accessibility measure based on the mean distance to public green space (i.e. one of the above) for all residents of a neighborhood in 2008 0.441 (0.196) 0.1–1.2 Statistics Netherlands [30]