Table 2.

Unadjusted and adjusted associations of the difference in patient-reported and GIS-calculated travel times

	Unadjusted analysis			Adjusted analysis
	Coefficient	95% CI	p-value	Coefficient	95% CI	p-value
Race/ethnicity
NH White	ref	–	–	ref	–	–
NH Black	5.73	(4.46, 6.99)	<0.001	2.01	(0.58, 3.44)	0.006
Educational Attainment
Less than high school degree				ref	–	–
High school degree				−0.94	(−2.77, 0.88)	0.309
4-year college degree or beyond				0.51	(−1.36, 2.38)	0.593
Insurance status
No insurance				ref	–	–
Private insurance				−3.68	(−8.71, 0.86)	0.112
Medicare				−3.41	(−7.98, 1.17)	0.145
Medicaid				−2.20	(−6.84, 2.44)	0.353
Age				0.13	(0.06, 0.19)	<0.001
Car access
Yes access to car				ref	–	–
No access to car				4.52	(2.85, 6.18)	<0.001
Population density
Quartile 1				ref	–	–
Quartile 2				1.32	(0.02, 2.63)	0.047
Quartile 3				3.57	(2.27, 4.85)	<0.001
Quartile 4				6.82	(5.36, 8.28)	<0.001
Intraclass Correlation Coefficient
Individual				0.04	(0.02, 0.11)
Census tract				0.47	(0.42, 0.51)

Notes: Adjusted models controlled for patient race, educational attainment, insurance coverage, age, car access, and census tract population density

Bold text denotes significance at p< 0.05

Outcome (patient-reported travel time minus GIS-calculated travel time) combines responses for both urology and radiation oncology practices