Table 1. Clinicopathological data and its association with the proportion of PoT.

			Proportion of tumour
	All cases		High		Low
	n	%	n	%	n	%	P-value
Gender
Male	58	40	44	40	14	40	1.000
Female	87	60	66	60	21	60
Tumour location
Colon	102	70	81	74	21	60	0.125
Rectum	43	30	29	26	14	40
Adjuvant treatment
Yes	21	15	93	85	31	89	0.557
No	124	86	17	15	4	11
Depth of invasion (pT)
pT1	11	8	10	9	1	3	0.064
pT2	27	19	22	20	5	14
pT3	95	66	71	65	24	69
pT4	12	8	7	6	5	14
Lymph node status (pN)
pN0	97	67	75	68	22	63	0.650
pN1	30	21	21	19	9	26
pN2	18	12	14	13	4	11
Distant metastasis (pM)
pM0	143	99	109	99	34	97	0.391
pM1	2	1	1	1	1	3
TNM stage
I	33	23	27	25	6	17	0.294
II	62	43	47	43	15	43
III	48	33	35	32	13	37
IV	2	1	1	1	1	3
Extramural vascular invasion
No	140	97	106	96	34	97	0.826
Yes	5	3	4	4	1	3

Abbreviations: PoT=proportion of tumour; TNM=tumour, node, metastasis.

Staging data was obtained using TNM, 5th edition (Sobin and Wittekind, 1997, pp 66–69).

Clinicopathological data and its association with the proportion of tumour (PoT) which has been dichotomised into PoT-high (>47% of tumour cells) and PoT-low (⩽47% of tumour cells).