Table 2. Frequencies of combination metastasis.

Features	Colon cancer		Rectal cancer		P value
	Number	(%)	Number	(%)
One site
Only liver	3,590	10.01	777	7.66	<0.001
Only lung	283	0.79	172	1.70	<0.001
Only bone	33	0.09	27	0.27	<0.001
Only brain	22	0.06	6	0.06	0.938
Two sites
Lung and liver	803	2.24	288	2.84	<0.001
Lung and bone	22	0.06	15	0.15	0.007
Lung and brain	8	0.02	4	0.04	0.345
Liver and bone	88	0.25	33	0.33	0.165
Liver and brain	9	0.03	2	0.02	0.760
Bone and brain	1	0.003	1	0.007	0.340
Three sites
Lung and liver and bone	90	0.25	28	0.28	0.658
Lung and liver and brain	23	0.06	1	0.03	0.035
Liver and bone and brain	5	0.01	0	0	--
Bone and brain and lung	2	0.005	0	0	--
Four sites
Liver and lung and bone and brain	8	0.02	3	0.03	0.676