Prognostic and predictive significance of tumor length in patients with esophageal squamous cell carcinoma undergoing radical resection

Table 1 Relationship between tumor length and other clinicopathological characteristics

Variable	Tumor length		P value
	≤4.0 cm	>4.0 cm
All cases	699	736
Age (year)	58.7	57.7	0.023
Sex			<0.001
Male	585	669
Female	114	67
Tumor location			0.01
Upper	22	11
Middle	364	327
Lower	313	398
Differentiation			0.910
G1	107	107
G2	131	137
G3	461	492
T stage			<0.001
T1	166	21
T2	150	93
T3	342	540
T4	41	82
N stage			<0.001
N0	376	295
N1	182	193
N2	106	170
N3	35	78
Vascular invasion			0.429
No	578	620
Yes	121	116
Perineural involvement			0.160
No	576	585
Yes	123	151
Number of resected lymph nodes	24.0	26.5	<0.001

ISSN: 1471-2407