Table 2.

Multivariate logistic regression analysis for brachytherapy usage

Factor	Odds ratio (95% CI)	P-value
Age grouping
< 60 years	1
60-70 years	0.73 (0.70-0.76)	< 0.001
> 70 years	0.48 (0.46-0.50)	< 0.001
Year of diagnosis
2004	1
2005	0.96 (0.91-1.01)	0.13
2006	0.93 (0.88-0.99)	0.01
2007	0.87 (0.83-0.92)	< 0.001
2008	0.77 (0.73-0.82)	< 0.001
2009	0.67 (0.63-0.71)	< 0.001
2010	0.68 (0.64-0.72)	< 0.001
2011	0.60 (0.56-0.63)	< 0.001
2012	0.57 (0.53-0.61)	< 0.001
Race
White	1
Black	0.80 (0.77-0.83)	< 0.001
Other	0.86 (0.80-0.93)	< 0.001
Distance from treatment center
First quartile (closest)	1
Second quartile	1.18 (1.13-1.22)	< 0.001
Third quartile	1.36 (1.31-1.41)	< 0.001
Last quartile (furthest)	2.22 (2.13-2.31)	< 0.001
Facility type
Non-academic program	1
Academic program	0.87 (0.84-0.90)	< 0.001
Insurance
None	1
Private insurance	2.07 (1.80-2.37)	< 0.001
Medicaid	1.01 (0.85-1.19)	0.92
Medicare	1.72 (1.50-1.98)	< 0.001
Other Government	1.39 (1.17-1.65)	< 0.001
Unknown	1.12 (0.94-1.34)	0.19