TABLE 2.

Predictors of RT Use Before Resection

Predictor	Odds Ratio	Upper 95%	Lower 95%	P
Age (per year)	0.99	0.99	1.00	0.118
Female sex	0.74	0.60	0.93	0.008
Race (ref = white)
Black	0.91	0.63	1.32	0.628
Other	0.78	0.43	1.39	0.349
Charlson/Deyo	0.85	0.68	1.07	0.165
Education above median	1.28	0.98	1.68	0.070
Income above median	0.77	0.59	1.02	0.066
Tumor size (ref: <5 cm)
5–9.9 cm	2.32	1.51	3.55	<0.001
10.0–19.9 cm	3.02	2.00	4.55	<0.001
>20.0 cm	1.36	0.85	2.18	0.201
Facility type (ref = community)
Academic/research program	2.73	2.15	3.46	<0.001
Tumor grade (ref = well differentiated)
Moderately differentiated	1.67	1.12	2.48	0.012
Poorly differentiated	2.03	1.48	2.80	<0.001
Undifferentiated/anaplastic	2.29	1.65	3.18	<0.001