Esophagectomy for locally advanced esophageal cancer, followed by chemoradiotherapy and adjuvant chemotherapy

Table 1 Characteristics of patients

Characteristics	CCRT1n (%)	RT alone1n (%)
Gender
Male	30 (100)	27 (90)
Female	0 (0)	3 (10)
Mean age±SD (yr)	59.9 ± 10.0	62.2 ± 6.7
ECOG performance status
0	18 (60)	18 (60)
1	11 (36.7)	10 (33.3)
2	1 (3.3)	2 (6.7)
Tumor size±SD (cm)	3.7 ± 1.0 (2.0-5.0)	4.5 ± 0.96 (2.0-6.0)
Location of tumor
Upper-third	7 (23.3)	2 (6.7)
Middle-third	19 (63.3)	22 (73.3)
Lower-third	4 (13.3)	6 (20.0)
Mean radiation dosage±SD (cGy)	5 880 ± 98	5 832 ± 274
Histologic classification
Well differentiated	9 (30.0)	7 (23.3)
Moderately differentiated	9 (30.0)	10 (33.3)
Poorly differentiated	12 (40.0)	13 (43.3)
Pathological disease staging
T3N0	11 (36.7)	11 (36.7)
T3N1	4 (13.3)	6 (20.0)
T4N0-1	15 (50.0)	13 (33.3)
T stage
T3	15 (50.0)	17 (56.7)
T4	15 (50.0)	13 (43.3)
N stage
N0	22 (73.3)	19 (63.3)
N1	8 (26.7)	11 (36.7)

¹All items have been calculated with no significant difference between treatment groups with t-test for continuous variables and χ² test for categorical variables. CCRT: Surgery plus concurrent chemoradiotherapy. RT alone: Surgery plus radiotherapy alone.