Different clinicopathologic features and favorable outcomes of patients with stage III left-sided colon cancer

Table 1 Baseline characteristics of 1095 colorectal cancer patients by tumor location

Characteristic	Right colon (%)	Left colon (%)	P value
Characteristic	N = 249 (22.7 %)	N = 846 (77.3 %)	P value
Age (years, mean ± SD)	64.94 ± 13.49	63.82 ± 12.85	0.233
Gender			0.118
Female	119 (47.8)	357 (42.2)
Male	130 (52.2)	489 (57.8)
Tumor size			0.003*
< 5 cm	121 (48.8)	495 (59.4)
≥ 5 cm	127 (51.2)	339 (40.6)
Histology			<0.001*
Well	20 (8.2)	51 (6.2)
Moderately	181 (74.5)	704 (85.7)
Poorly	42 (17.3)	66 (8.0)
AJCC Stage^a (Initial diagnosis)			0.016*
I	28 (11.2)	164 (19.4)
II	101 (40.6)	286 (33.8)
III	80 (32.1)	251 (29.7)
IV	40 (16.1)	145 (17.1)
Tumor depth			0.017*
T1	12 (4.8)	59 (7.0)
T2	24 (9.7)	139 (16.5)
T3	199 (80.3)	591 (70.4)
T4	13 (5.2)	51 (6.1)
Lymph Node metastasis			0.677
N0	142 (57.3)	491 (58.7)
N1	62 (25.0)	217 (25.9)
N2	44 (17.7)	129 (15.4)
Lymph Node metastasis			0.694
No	142 (57.3)	491 (58.7)
Yes	106 (42.7)	346 (41.3)
Vascular invasion			0.529
No	163 (66.5)	561 (68.7)
Yes	82 (33.5)	256 (31.3)
Perineural invasion			0.833
No	157 (63.8)	516 (63.1)
Yes	89 (36.2)	302 (36.9)
Pre-op serum CEA^b level			0.496
< 5 ng/ml	121 (51.5)	424 (54.0)
≥ 5 ng/ml	114 (48.5)	361 (46.0)
Post-op serum CEA^b level			0.023*
< 5 ng/ml	158 (68.1)	594 (75.6)
≥ 5 ng/ml	74 (31.9)	192 (24.4)
Pre-op serum Albumin level (g/dl)	3.56 ± 0.44	3.63 ± 0.45	0.062
Diabetes mellitus			0.731
Yes	60 (24.1)	195 (23.0)
No	189 (75.9)	651 (77.0)
Chemotherapy			0.427
Yes	161 (64.9)	570 (67.6)
No	87 (35.1)	273 (32.4)
Cardiac disease			0.764
Yes	103 (41.4)	359 (42.4)
No	146 (58.6)	487 (57.6)
Renal disease			0.690
Yes	13 (5.2)	39 (4.6)
No	236 (94.8)	807 (95.4)
BMI^c	23.53 ± 4.25	23.63 ± 3.62	0.758

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