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Table 5 Spearman rank correlation coefficients (r) between different impedance measures and same health facility identified as closest using different impedance measures (%) for impedance measures calculated to closest CEmOC facility

From: Methods to measure potential spatial access to delivery care in low- and middle-income countries: a case study in rural Ghana

  Euclidean distance Network distance Mechanized network time Non-mechanized network time Mechanized raster time
  r % r % r % r % r %
Compound as origin 1
Network distance (km) 0.9849 91.6 1        
Mechanized network time (hr) 0.7388 89.4 0.7852 91.0 1      
Non-mechanized network time (hr) 0.9805 91.6 0.9980 100 0.8116 97.0 1    
Mechanized raster time (hr) 0.5333 68.5 0.5847 73.4 0.8868 67.8 0.6171 68.7 1  
Non-mechanized raster time (hr) 0.9680 90.4 0.9852 97.8 0.8439 88.5 0.9923 90.7 0.6749 73.6
Village as origin 2
Network distance (km) 0.9714 84.8 1        
Mechanized network time (hr) 0.7115 87.3 0.7576 87.5 1      
Non-mechanized network time (hr) 0.9707 84.8 0.9996 100 0.7703 87.5 1    
Mechanized raster time (hr) 0.6287 65.6 0.6794 65.4 0.9417 75.5 0.6931 65.4 1  
Non-mechanized raster time (hr) 0.9703 84.1 0.9949 98.6 0.7905 87.1 0.9966 98.6 0.7232 65.8
  1. 1n = 47,537 compounds 2n = 433 villages; n = 8 CEmOC facilities.