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Table 6 Pearson'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

Pearson 's correlation
Label Variables (Var.) 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 (%) 0.52 1.00                    
Var. 3 Size(km 2 ) -0.24 -0.55 1.00                   
Var. 4 Mountain area(km 2 ) -0.36 -0.48 a0.90 1.00                  
Var. 5 Percentage of emergency team with EMT to all emergency teams (%) 0.54 0.42 -0.31 -0.31 1.00                 
Var. 6 Kilometres of general road per square kilometre 0.78 0.26 -0.42 -0.51 0.41 1.00                
Var. 7 Kilometres of highway road per square kilometre 0.38 0.29 -0.28 -0.25 0.42 0.46 1.00               
Var. 8 Total kilometres of all roads per square kilometre a0.86 0.35 -0.43 -0.53 0.48 a0.97 0.50 1.00              
Var. 9 Kilometres of impassable road per square kilometre 0.57 -0.04 -0.19 -0.30 0.23 a0.80 0.20 0.79 1.00             
Var. 10 Average coverage area per tertiary care centre -0.47 -0.38 0.57 0.53 -0.59 -0.54 -0.43 -0.56 -0.38 1.00            
Var. 11 Average coverage area per fire station -0.60 -0.42 0.43 0.53 -0.31 -0.63 -0.46 -0.67 -0.49 0.58 1.00           
Var. 12 Average coverage area per ambulance -0.64 -0.50 0.65 0.69 -0.32 -0.71 -0.49 -0.75 -0.50 0.68 a0.82 1.00          
Var. 13 Average coverage are per emergency team -0.64 -0.49 0.63 0.68 -0.29 -0.72 -0.49 -0.75 -0.51 0.67 a0.86 a0.99 1.00         
Var. 14 Average coverage area per emergency team with EMT -0.61 -0.48 0.65 0.66 -0.67 -0.68 -0.52 -0.72 -0.48 a0.82 0.75 a0.87 a0.85 1.00        
Var. 15 Average coverage area per EMT -0.60 -0.57 0.76 0.77 -0.56 -0.64 -0.48 -0.69 -0.42 0.76 0.73 a0.92 a0.90 a0.94 1.00       
Var. 16 Average coverage area per emergency crew -0.62 -0.47 0.59 0.64 -0.33 -0.70 -0.47 -0.73 -0.52 0.74 a0.86 a0.93 a0.95 a0.86 a0.88 1.00      
Var. 17 Average coverage area per emergency medical specialist -0.46 -0.45 0.45 0.48 -0.52 -0.47 -0.33 -0.51 -0.31 0.69 0.48 0.58 0.55 0.66 0.67 0.57 1.00     
Var. 18 Average coverage area per tertiary hospitals -0.49 -0.39 0.60 0.61 -0.52 -0.57 -0.43 -0.60 -0.38 0.67 0.65 0.70 0.69 0.77 0.77 0.73 0.55 1.00    
Var. 19 Average coverage area per secondary hospitals -0.55 -0.40 0.58 0.58 -0.40 -0.61 -0.42 -0.64 -0.47 0.66 0.59 a0.82 a0.80 0.78 a0.85 0.78 0.59 0.64 1.00   
Var. 20 Average cover area per primary hospitals -0.33 -0.31 0.45 0.43 -0.32 -0.42 -0.36 -0.43 -0.25 0.37 0.32 0.51 0.49 0.52 0.61 0.43 0.52 0.54 0.68 1.00  
Var. 21 Population density a0.91 0.71 -0.42 -0.45 0.52 0.71 0.39 0.78 0.44 -0.44 -0.53 -0.59 -0.58 -0.56 -0.57 -0.58 -0.43 -0.48 -0.48 -0.30 1.00
  1. aCoefficient correlation of >0.8.
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