Comparison of the eighth version of the American Joint Committee on Cancer manual to the seventh version for colorectal cancer: A retrospective review of our data

Table 6 Comparison of 5-year disease-free survival and overall survival rate for stage and sub-stage using American Joint Committee on Cancer-7^th edition and American Joint Committee on Cancer-8^th edition (%)

			0	I	IIA	IIB	IIC	IIIA	IIIB	IIIC	IVA	IVB	IVC	Log-rank χ2	P
OS	Sub-stage	AJCC-7	100	98.5	82.6	76.8	67.7	65.4	60	44.9	8.3	0	-	1423.53	< 0.01
		AJCC-8	100	98.5	82.6	76.8	67.7	65.4	60	44.9	8.3	0	0	1608.11	< 0.01
					II			III			IV
	Stage	AJCC-7	100	98.5	79.1			58.2			3.6			913.56	< 0.01
		AJCC-8	100	98.5	79.1			58.2			3.6			875.46
DFS	Sub-stage	AJCC-7	100	93.1	78.3	73.2	61.3	65.4	56.3	37	8.3	0	-	1418.9	< 0.01
		AJCC-8		93.1	78.3	73.2	61.3	65.4	56.3	37	8.3	0	0	1603.4	< 0.01
					II			III			IV
	Stage	AJCC-7	100	93.1	74.7			54.4			3.6			875.46	< 0.01
		AJCC-8		93.1	74.7			54.4			3.6			875.46	< 0.01

DFS: Disease-free survival; OS: Overall survival; AJCC: American Joint Committee on Cancer.