Evaluating the benefit of adjuvant chemotherapy in patients with ypT0–1 rectal cancer treated with preoperative chemoradiotherapy

Table 4 Risk factors associated with overall survival

		Univariate		Multivariate
		HR	P value	HR	95% CI	P value
Adjuvant chemotherapy			0.306			0.484
	No	1		1
	Yes	0.729		0.797	0.422–1.504
Age		1.047	0.001	1.052	1.022–1.084	0.001
Sex			0.156			0.213
	Male	1		1
	Female	0.668		0.701	0.400–1.227
cT category			0.122			0.029
	cT1–2	1		1
	cT3–4	1.757		2.268	1.085–4.741
cN category			0.475
	cN−	1
	cN+	1.296
Type of surgery			0.692
	Local excision	1
	Radical resection	1.174
ypT stage			0.612
	ypT0	1
	ypTis–1	0.861

HR: Hazard ratio; CI: Confidence interval.