Table 1.

Percentage of Physicians Who Reported That the Benefits of Adjuvant Therapy Are Very Likely to Outweigh the Risks for Stage II Colon and Rectal Cancers

Physician Characteristic	No.	%	Chemotherapy for Stage II Colon Cancer	χ2 P	Chemotherapy for Stage II Rectal Cancer	χ2 P	Radiotherapy for Stage II Rectal Cancer	χ2 P
All physicians			21.9		50		50.4
Specialty
Medical oncologist	466	36	14.2	< .001	56.4	< .001	62	< .001
Radiation oncologist	211	16	23.2		41.2		44.6
Colorectal surgeon/surgical oncologist	103	8	9.7		38.8		44.7
General surgeon	516	40	30.8		50		43.4
Age, years
< 40	228	18	16.9	< .001	48.5	.1	45.9	.35
40-49	400	31	17.7		48.5		50.7
50-54	217	17	19.3		49.2		51.5
55-59	217	17	25.8		46.6		48.3
≥ 60	228	18	33.2		58.3		55.2
Missing	6	0
US medical graduate
Yes	1,088	84	21.5	.38	48.2	.002	48.6	.002
No	201	16	24.3		59.9		60.3
Missing	7	1
Practice site
Office, solo	150	12	35	< .001	53.4	.41	56.1	.27
Office, single-specialty group	346	27	21.1		53.3		48.8
Office, multi-specialty group	103	8	21.9		53.1		55.1
HMO	243	19	19.8		48.6		52.3
VA/government	102	8	11.8		47.1		52.9
Hospital	352	27	21.6		46.3		46.1
NCI cancer center
Yes	300	23	22.2	.87	49.8	.96	46.5	.12
No/don't know	974	75	21.8		50.1		51.6
Missing	22	2
No. of patients per month
≤ 2	325	25	29.9	< .001	47	.38	46.2	< .001
2 to 5	395	30	21.2		51.6		44.1
5 to 10	269	21	17.4		48		52.7
>10	276	21	18.2		53.1		61.8
Missing	31	2
Enroll patients onto clinical trials
Yes	719	55	18.2	< .001	50.8	.52	53.9	.002
No	523	40	27.3		48.9		45.2
Missing	54	4
Teaching
None	654	50	21.8	.18	50.7	.56	49.7	.61
1-5 d/mo	289	22	25.5		51.3		53
≥ 6 d/mo	332	26	19.1		47.4		49.5
Missing	21	2
Attend tumor board
Weekly	705	54	18.3	< .001	48.8	.64	51.2	.78
Monthly	326	25	22.4		50.7		49.9
Quarterly or less often	250	19	31.3		52.3		48.7
Missing	15	1
% patients in managed care
0-20	319	25	20.2	.15	51.5	.8	51.6	.68
21-49	267	21	21.9		50.8		47
50-78	316	24	26.1		50.5		51
79-100	286	22	19.4		47.5		51.3
Missing	108	8
Base clinical income
Mostly fee-for-service	485	37	28.5	.002	51.8	.79	50.4	.71
Mixture fee-for-service and capitation	332	26	17.2		47.6		42.5
Salary, productivity based	391	30	18.9		48.5		51.6
Salary, not productivity based	42	3	19.4		50.5		49.7
Missing	46	4

Abbreviations: HMO, health maintenance organization; VA, Veterans Affairs; NCI, National Cancer Institute.