Table 2.

Univariate analysis of pathological prognostic factors in Dukes' B colon cancer

Factor	Category	% 5 year survival (95% CI)	Log rank χ2(df)	Log rank p value
Extent of spread	Slight	89.3 (78.7–94.7)	15.00 (2)	0.0006
	Moderate	76.9 (67.2–84.1)
	Extensive	61.5 (48.7–72.0)
Peritoneal involvement	Absent	84.3 (69.5–92.3)	29.53 (3)	<0.0001
	Inflammatory	88.4 (80.1–93.4)
	Present	67.0 (52.6–78.0)
	With ulceration	50.9 (35.3–64.6)
Peritoneal involvement	Absent/inflammatory	87.1 (80.2–91.7)	21.73 (1)	<0.0001
	Present±ulceration	59.9 (49.4–68.6)
Venous invasion	Not evident	83.7 (76.2–89.0)	16.05 (2)	0.0003
	Submucosal	73.0 (49.4–87.0)
	Extramural	61.6 (49.6–71.5)
Venous invasion	Not evident	83.7 (76.2–89.0)	15.23 (1)	0.0001
	Submucosal and/or extramural	64.1 (53.7–72.8)
Margin involvement	Absent	78.7 (72.3–83.7)	7.62 (2)	0.02
	Inflammatory	57.1 (35.8–73.6)
	Present	Longest survivor FU only 47 months
Margin involvement	Absent	78.7 (72.3–83.7)	7.31 (1)	0.007
	Inflamed or present	55.3 (35.8–73.6)
Tumour perforation	Absent	76.6 (70.5–81.7)	9.27 (1)	0.0023
	Present	46.8 (14.8–73.9)
Adjacent organ  involvement	Absent	78.4 (72.1–83.4)	7.08 (1)	0.008
	Present	51.7 (29.9–69.7)

FU, follow up.