Table 3.

Estimated marginal utilities for knee replacement

Variable	Estimate	Standard Error
Main effects
Travel time	−0.135	0.001***
Travel time2	0.000	0.000***
Travel time3	0.000	0.000***
Patient recommendation	−0.539	0.017***
1-year revision rate	−0.019	0.005***
Medical interdisciplinarity	−0.008	0.019
Medical therapy offerings	−0.040	0.017*
Procedure volume	0.003	0.000***
Certification	0.159	0.009***
Professional recommendation (award)	0.070	0.014***
Hospital type: non-profit vs. private	−0.218	0.012***
Hospital type: public vs. private	−0.152	0.012***
Interaction with travel time
x Age	−0.001	0.000***
x Comorbidity index	−0.004	0.001***
x Number of hospitals in 30 min radius	−0.003	0.000***
x Median income	0.000	0.000**
Interaction with recommendation
x Age	0.009	0.002***
x Comorbidity index	0.044	0.015**
x Number of hospitals in 30 min radius	−0.001	0.002
x Median income	0.000	0.000***
Interaction with 1-year revision rate
x Age	−0.001	0.000
x Comorbidity index	−0.004	0.004
x Number of hospitals in 30 min radius	−0.001	0.000
x Median income	0.000	0.000**
Interaction with medical interdisciplinarity
x Age	0.001	0.002
x Comorbidity index	0.015	0.017
x Number of hospitals in 30 min radius	0.027	0.003***
x Median income	0.000	0.000***
Interaction with medical therapy offering
x Age	0.004	0.002*
x Comorbidity index	0.124	0.016***
x Number of hospitals in 30 min radius	−0.029	0.002***
x Median income	0.000	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 certification
x Age	0.000	0.001
x Comorbidity index	0.042	0.008***
x Number of hospitals in 30 min radius	−0.008	0.001***
x Median income	0.000	0.000
Interaction with professional recommendation (award)
x Age	−0.009	0.001***
x Comorbidity index	0.050	0.012***
x Number of hospitals in 30 min radius	0.010	0.002***
x Median income	0.000	0.000
			As % of average travel time
WTT (patient recommendation)	1.370		5.6%
WTT (1-year revision)	0.171		0.7%
WTT (procedure volume)	3.066		12.5%
WTT (certification)	1.297		5.3%
WTT (professional recommendation)	0.571		2.3%
Number of patients	82,014
Number of hospitals	844
Prob>chi2	0.000
Pseudo R2	0.478

Notes: Multinomial logit model for colorectal resection patients treated in 2017 and 2018. Coefficients represent marginal utilities. Coefficients of the covariates number of beds, university hospital status and their interactions with patient features are not reported here but available on request along with travel time² and travel time³ and hospital type interactions with patient features

*** p < 0.001; ** p < 0.01; * p < 0.05