TABLE 4.

Relation Between 5-Year Cancer-specific Mortality and Level of Adjuvant Radiation Therapy and Chemotherapy Completion by Stage II and III Rectal Cancer Patients

	Stage II, n = 1524			Stage III, n = 1362
	No. (%)	Unadjusted cancer-related mortality rate,* %	Adjusted RR of cancer-related death† (95% CI)	No. (%)	Unadjusted cancer-related mortality rate, %	Adjusted RR of cancer-related death† (95% CI)
Radiation therapy and chemotherapy completed	272 (17.9)	22.1	0.74 (0.54,0.97)	498 (36.6)	41.0	0.80 (0.65,0.96)
Chemotherapy completed, no radiation therapy or incomplete course	47 (3.1)	25.5	0.94 (0.54,1.48)	89 (6.5)	40.4	0.76 (0.53,1.02)
Radiation therapy completed, no chemotherapy or incomplete course	398 (26.1)	33.9	0.92 (0.73,1.14)	314 (23.1)	48.7	0.95 (0.78,1.13)
Initiated radiation therapy and/or chemotherapy, without completion of either	85 (5.6)	32.9	1.02 (0.68,1.45)	62 (4.6)	46.8	0.90 (0.62,1.21)
Neither radiation therapy nor chemotherapy initiated	722 (47.4)	29.1	1.00	398 (29.2)	47.7	1.00

RR indicates relative risks; 95% CI, confidence interval.

Missing values for logistic regressions: median household income (58 stage II, 41 stage III), residence location (4 stage II, 4 stage III), missing date of death (1 stage III).

Chi squares for unadjusted mortality by 5 levels of completion.

^*P ≤.05.

^†Adjusted for patients’ age, race, sex, marital status, residence location, SEER registry, median household income, comorbidity, extent of tumor, grade of tumor, and number of positive nodes.