Table 2.

Propensity Modeling of Receipt of RFA

Characteristics	OR	95% CI	P
Year of diagnosis
2004-2007	Reference
2008-2011	0.359	0.255 to 0.504	<.0001
2012-2015	0.111	0.075 to 0.166	<.0001
Region
EAST	Reference
NORTHWEST or WEST	2.342	1.595 to 3.438	<.0001
NORTH	0.563	0.284 to 1.117	0.1003
SOUTHWEST	0.956	0.289 to 3.164	0.9407
Tumor size
≤1 cm	Reference
≤2 cm	0.303	0.191 to 0.479	<.0001
≤3 cm	0.153	0.093 to 0.251	<.0001
Unknown	1.395	0.280 to 6.966	0.6846
Education
≥21	Reference
13-20	1.428	0.873 to 2.336	0.1553
7-12	0.738	0.425 to 1.282	0.2814
<7	1.784	0.888 to 3.585	0.1041
Median income level
<38000	Reference
38000-47999	0.736	0.249 to 2.175	0.5797
48000-62999	2.411	0.911 to 6.376	0.0762
>63000	1.586	0.569 to 4.423	0.3777

Abbreviations: RFA: radiofrequency ablation; OR: Odds Ratio.