Table 1. Associations between patient characteristics and ORAOV1 gene amplification (n = 94).

Patients characteristics	ORAOV1		P-values
	Amp (−)	Amp (+)
Number	45	49
Age (years)
<70	33	34	0.82
>70	12	15
Sex
Male	39	43	1.00
Female	6	6
Location
Ut or Mt	20	35	0.012*
Lt or Ae	25	14
Tumor differentiation
Well or moderate	41	36	0.033*
Poor	4	13
pStage
IIIA	17	26	0.15
IIIB or IIIC	28	23
Lymphatic invasion
0	9	8	0.79
1 or 2	36	41
Vascular invasion
0	33	38	0.81
1	12	11
Residual cancer
0	7	5	0.54
1 or 2	38	44

Abbreviations: Amp, amplification; Ut, upper thoracic esophagus; Mt, middle thoracic esophagus; Lt, lower thoracic esophagus; Ae, abdominal esophagus.