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Table 2 Multiple regression model for Day Surgery list utilization. (only reference categories and retained model variables listed).

From: Is theatre utilization a valid performance indicator for NHS operating theatres?

Risk Factor Model coefficient Beta coefficent Beta Standard Error p-value Change in R-Square Model R-Square
Model Constant 38.1 - 0.6 <0.01 - 0.603
List volume (1 (unit)   0.093 0.0 <0.01 0.394  
List factors       
   List Overruns   19.2 0.4 <0.01 0.152  
   Late-starts       
<30 mins   Ref     
30–60 mins   -3.1 0.3 <0.01 0.007  
>1 hr   -10.2 0.6 <0.01 0.014  
Personnel factors       
   Surgeon       
Surgeon 1   Ref     
Surgeon 2   -13.2 0.9 <0.01 0.004  
Surgeon 3   -3.8 0.5 <0.01 0.002  
Surgeon 5   -5.4 1.1 <0.01 0.001  
Surgeon 7   -8.7 0.6 <0.01 0.005  
Surgeon 8   -12.8 1.3 <0.01 0.004  
Surgeon 9   -7.3 1.2 <0.01 0.001  
Surgeon 10   -4.8 0.9 <0.01 0.001  
Surgeon 11   -7.4 0.6 <0.01 0.004  
Surgeon 12   3.8 0.7 <0.01 0.007  
Surgeon 14   -2.7 1.4 0.05 0.000  
Surgeon 'others'   -4.4 0.5 <0.01 0.002  
   Anaesthetist       
Anaesthetist 1   Ref     
Anaesthetist 2   3.6 1.2 <0.01 0.000  
Anaesthetist 5   4.6 0.9 <0.01 0.001  
Anaesthetist 9   -3.4 1.1 <0.01 0.000  
Anaesthetist 10   3.5 0.9 <0.01 0.000  
Session factors       
   Session type       
AM list   Ref     
   Theatre       
Day Theatre 2   Ref     
Day Theatre 4   2.4 0.8 <0.01 0.000  
Day Theatre 5   -1.5 0.4 <0.01 0.002