Table 2.

Predictors of surgery

	Received surgery (%)	Unadjusted odds ratio (95 % CI)	P value*
Age (<70)
Stage I–CH	54.51	4.16 (3.78 to 4.58)	<0.0001
Stage I–TH	69.59	3.42 (3.09 to 3.78)	<0.0001
Stage II–CH	66.19	2.48 (2.34 to 2.63)	<0.0001
Stage II–TH	70.43	1.92 (1.82 to 2.03)	<0.0001
Race (White)
Stage I–CH	33.51	0.88 (0.78 to 0.99)	0.0362
Stage I–TH	55.90	1.20 (1.07 to 1.34)	0.0018
Stage II–CH	55.67	1.20 (1.11 to 1.29)	<0.0001
Stage II–TH	65.61	1.45 (1.36 to 1.55)	<0.0001
Charlson Comorbidity Score (2 or more)
Stage I–CH	22.25	0.53 (0.44 to 0.62)	<0.0001
Stage I–TH	49.89	0.81 (0.67 to 0.98)	0.026
Stage II–CH	49.66	0.80 (0.72 to 0.89)	<0.0001
Stage II–TH	59.20	0.81 (0.73 to 0.90)	0.0002
Insurance (private)
Stage I–CH	53.98	3.25 (2.94 to 3.64)	<0.0001
Stage I–TH	70.56	2.69 (2.41 to 3.00)	<0.0001
Stage II–CH	66.11	2.00 (1.88 to 2.14)	<0.0001
Stage II–TH	71.11	1.66 (1.56 to 1.76)	<0.0001
Hospital Setting (Community)
Stage I	34.00	0.42 (0.40 to 0.45)	<0.0001
Stage II	54.91	0.69 (0.66 to 0.72)	<0.0001

^*P values based on Pearson’s chisquared test for unadjusted percentages of patients receiving “any surgery” and “nonsurgical therapy”

CH community hospitals; TH teaching hospitals