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Table 1 Description of GI predictor variables used in the multi-level linear regression analysis in this study

From: Relationships between health outcomes in older populations and urban green infrastructure size, quality and proximity

Predictor variable Description Expressed as: Use in regression analysis
Total non-built land-cover Aggregated proportion of land-cover that consists of vegetation or water. % cover LSOAˉ1 Step 1
Water Proportion of land-cover by water (water bodies and water courses) % cover LSOAˉ1 Step 2 and 3
Ground layer vegetation Proportion of land-cover by grass lawns and other ground flora % cover LSOAˉ1 Step 2 and 3
Field layer vegetation Proportion of land-cover by tall grasses, forbs and shrubs % cover LSOAˉ1 Step 2 and 3
Canopy Proportion of land-cover by trees % cover LSOAˉ1 Step 2 and 3
Public parks and recreation Proportion of land-use that includes public parks, sports grounds, playing fields, allotments and community gardens % cover LSOAˉ1 Step 2 and 3
Amenity green-space Proportion of land-use consisting of landscaped open spaces in residential or commercial areas with primarily aesthetic functions % cover LSOAˉ1 Step 2 and 3
Private gardens Proportion of land-use by private domestics gardens % cover LSOAˉ1 Step 2 and 3
Peri-urban Proportion of non-urban land-use, primarily consisting of arable land, grazed pasture and peat moorland outside of the main urban extent of the study area but within the Greater Manchester administrative boundary % cover LSOAˉ1 Step 2 and 3
Previously developed land Proportion of land previously subject to development and without any formal function at the time of data production % cover LSOAˉ1 Step 2 and 3
Urban fabric Proportion of all developed (built) land-use types and associated built infrastructure including residential, commercial, transport and industrial % cover LSOAˉ1 Step 2 and 3
Informal urban greenery Proportion of non-built land-cover occurring within the urban fabric class but without formal designated use (e.g. street trees, roadside vegetation). % cover LSOAˉ1 Step 2 and 3
% population ≤ 300 m to public parks and recreation land Proportion of the local population living within 300 m of any site in the public parks and recreation class (including sites within 300 m but in neighbouring LSOAs). % population LSOAˉ1 Step 2 and 3
% population ≤ 200 m to public parks and recreation land Proportion of the local population living within 200 m of any site within the public parks and recreation class % population LSOAˉ1 Step 2 and 3
% population ≤ 100 m to public parks and recreation land Proportion of the local population living within 100 m of any site within the public parks and recreation class % population LSOAˉ1 Step 2 and 3
% population ≤ 200 m to 2 ha public parks and recreation land Proportion of the local population living within 200 m of sites > 2 ha within the public parks and recreation class % population LSOAˉ1 Step 2 and 3
Shannon’s Diversity Index (SHDI) Metric indicating land-cover diversity Dimensionless with values starting from 0 without limit (though rarely exceeding 4) Step 2 and 3
Mean Patch Size Mean area of all non-built patches m2 LSOAˉ1 Step 2 and 3
Effective Mesh Size (Meff) Measure of connectedness of non-built land-cover m2 LSOAˉ1 Step 2 and 3
% non-built cover in gardens Proportion of gardens that is vegetation or water Percentage of total gardens cover LSOAˉ1 that is non-built Step 3
% non-built cover in amenity green-space Proportion of amenity green-space that is vegetation or water Percentage of total gardens cover LSOAˉ1 that is non-built Step 3
% non-built cover in public parks and recreation land Proportion of public parks and recreation land that is vegetation or water Percentage of total gardens cover LSOAˉ1 that is non-built Step 3
% non-built cover in institutional land Proportion of institutional land that is vegetation or water Percentage of total gardens cover LSOAˉ1 that is non-built Step 3
Mean patch size of gardens Mean area of garden land-use patches m2 LSOAˉ1 Step 3
Mean patch size of amenity green-space Mean area of amenity green-space land-use patches m2 LSOAˉ1 Step 3
Mean patch size of public parks and recreation land Mean area of public parks and recreation land-use patches m2 LSOAˉ1 Step 3
Mean patch size of institutional land Mean area of institutional land-use patches m2 LSOAˉ1 Step 3