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Table 7 Spearman's correlation among variables

From: The effect of the development of an emergency transfer system on the travel time to tertiary care centres in Japan

Spearman's correlation
Label Variables Var. 1 Var. 2 Var. 3 Var. 4 Var. 5 Var. 6 Var. 7 Var. 8 Var. 9 Var. 10 Var. 11 Var. 12 Var. 13 Var. 14 Var. 15 Var. 16 Var. 17 Var. 18 Var. 19 Var. 20 Var.21
Var. 1 Population 1.00                     
Var. 2 Pavement ratio (%) 0.03 1.00                    
Var. 3 Size(km 2 ) 0.11 -0.57 1.00                   
Var. 4 Mountain area(km 2 ) -0.16 -0.46 a0.85 1.00                  
Var. 5 Percentage of emergency team with EMT to all emergency teams (%) 0.37 0.31 -0.29 -0.36 1.00                 
Var. 6 Kilometres of general road per square kilometre 0.58 0.05 -0.45 -0.55 0.34 1.00                
Var. 7 Kilometres of highway road per square kilometre 0.36 0.07 -0.25 -0.27 0.37 0.54 1.00               
Var. 8 Total kilometres of all roads per square kilometre 0.65 0.11 -0.44 -0.55 0.40 a0.98 0.55 1.00              
Var. 9 Kilometres of impassable road per square kilometre 0.60 -0.11 -0.22 -0.28 0.25 0.71 0.32 0.75 1.00             
Var. 10 Average coverage area per tertiary care centre -0.51 -0.35 0.59 0.68 -0.65 -0.68 -0.45 -0.70 -0.51 1.00            
Var. 11 Average coverage area per fire station -0.64 -0.38 0.50 0.66 -0.47 -0.70 -0.47 -0.76 -0.59 0.74 1.00           
Var. 12 Average coverage area per ambulance -0.60 -0.40 0.60 0.71 -0.43 a-0.80 -0.49 a-0.83 -0.59 0.77 a0.87 1.00          
Var. 13 Average coverage are per emergency team -0.58 -0.40 0.61 0.71 -0.42 a-0.81 -0.51 a-0.84 -0.60 0.77 a0.88 a0.99 1.00         
Var. 14 Average coverage area per emergency team with EMT -0.58 -0.41 0.59 0.72 -0.67 -0.76 -0.52 a-0.80 -0.56 a0.86 a0.87 a0.93 a0.93 1.00        
Var. 15 Average coverage area per EMT -0.52 -0.54 0.67 0.78 -0.61 -0.71 -0.52 -0.76 -0.51 a0.83 a0.83 a0.93 a0.92 a0.96 1.00       
Var. 16 Average coverage area per emergency crew -0.57 -0.35 0.61 0.72 -0.42 -0.77 -0.47 -0.78 -0.60 a0.82 a0.85 a0.92 a0.93 a0.90 a0.88 1.00      
Var. 17 Average coverage area per emergency medical specialist -0.48 -0.47 0.56 0.66 -0.59 -0.57 -0.41 -0.62 -0.42 0.74 0.70 0.78 0.77 0.79 a0.85 0.75 1.00     
Var. 18 Average coverage area per tertiary hospitals -0.40 -0.33 0.70 0.76 -0.55 -0.70 -0.46 -0.69 -0.46 a0.89 0.76 a0.81 a0.81 a0.85 a0.83 a0.85 0.75 1.00    
Var. 19 Average coverage area per secondary hospitals -0.59 -0.33 0.55 0.66 -0.42 -0.76 -0.40 a-0.80 -0.65 0.66 0.74 a0.86 a0.85 0.80 a0.84 0.78 0.70 0.68 1.00   
Var. 20 Average cover area per primary hospitals -0.29 -0.34 0.56 0.58 -0.42 -0.64 -0.52 -0.66 -0.30 0.45 0.49 0.64 0.62 0.59 0.66 0.48 0.60 0.54 0.67 1.00  
Var. 21 Population density 0.64 0.44 -0.61 -0.74 0.54 0.79 0.51 a0.85 0.56 a-0.83 a-0.88 a-0.96 a-0.95 a-0.95 a-0.96 a-0.90 a-0.80 a-0.82 a-0.88 -0.64 1.00
  1. aCoefficient correlation of >0.8.