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Table 3 Estimated marginal utilities and willingness to travel

From: Robotic-assisted surgery for prostatectomy – does the diffusion of robotic systems contribute to treatment centralization and influence patients’ hospital choice?

Variable

Estimate

Standard Error

 

Main effects

 Travel time

-0.162

0.004***

 

 Travel time2

0.001

0.000***

 

 Travel time3

0.000

0.000***

 

 Robotic-assisted surgery system

0.743

0.048***

 

 Procedure volume

0.002

0.000***

 

 Patient recommendation score

-0.475

0.079***

 

 1-year reoperation ratio

0.017

0.012

 

 Prostate cancer treatment center

0.466

0.048***

 

 Size—number of beds

0.000

0.000**

 

 Hospital type: non-profit vs. private

-0.168

0.065*

 

 Hospital type: public vs. private

-0.184

0.062**

 

Interaction with travel time

 x Age

-0.001

0.000**

 

 x Comorbidity index

-0.002

0.001*

 

 x Number of hospitals in 30 min radius

-0.004

0.000***

 

 x Median income

0.000

0.000**

 

Interaction with robotic-assisted surgery system

 x Age

-0.014

0.007*

 

 x Comorbidity index

0.021

0.017

 

 x Number of hospitals in 30 min radius

0.005

0.005

 

 x Median income

-0.001

0.000***

 

Interaction with procedure volume

 x Age

0.000

0.000

 

 x Comorbidity index

0.000

0.000***

 

 x Number of hospitals in 30 min radius

0.000

0.000***

 

 x Median income

0.000

0.000***

 

Interaction with patient recommendation score

 x Age

0.007

0.011

 

 x Comorbidity index

-0.007

0.030

 

 x Number of hospitals in 30 min radius

0.012

0.007

 

 x Median income

0.000

0.000

 

Interaction with 1-year reoperation ratio

 x Age

-0.003

0.002

 

 x Comorbidity index

0.013

0.004**

 

 x Number of hospitals in 30 min radius

-0.004

0.001***

 

 x Median income

0.000

0.000**

 

Interaction with prostate cancer treatment center

 x Age

0.012

0.007

 

 x Comorbidity index

-0.037

0.018*

 

 x Number of hospitals in 30 min radius

0.017

0.006**

 

 x Median income

0.000

0.000***

 
   

As % of average travel time

WTT (robotic-assisted surgery system)

7.254

 

21.9%

WTT (procedure volume)

2.849

 

8.2%

WTT (recommendation score)

1.317

 

3.9%

WTT (1-year reoperation ratio)

-0.2981

 

-1.1%1

WTT (prostate cancer center certification)

4.549

 

13.2%

WTT (hospital size)

0.571

 

2.6%

Number of patients

4,614

  

Number of hospitals

352

  

Prob > chi2

0.000

  

Pseudo R2

0.573

  
  1. Multinomial logit model for colorectal resection patients treated in 2015. Coefficients represent marginal utilities. Coefficients of the interaction terms of travel time2 and travel time3, size, hospital type are not presented, but can be delivered upon request; 1. Impact is not statistically significant
  2. *** p < 0.001
  3. ** p < 0.01
  4. * p < 0.05