Table 4.

Age-stratified Cox proportional hazards regression model with a robust variance estimator for evaluating the risk of death among patients with colon adenocarcinoma who received adjuvant oral or intravenous fluoropyrimidine chemotherapy.

≤60 years old				>60 years old
Adjuvant Treatment	aHR*	95% CI	P value	Adjuvant Treatment	aHR*	95% CI	P value
IV fluoropyrimidines	1.00			IV fluoropyrimidines	1.00
Oral fluoropyrimidines	1.06	0.83-1.37	.6358	Oral fluoropyrimidines	1.45	1.28-1.65	<.0001

*All the aforementioned variables in Table 2 were used in the multivariate analysis. aHR, adjusted hazard ratio.