Evaluation of the 7th edition of the TNM classification in patients with resected esophageal squamous cell carcinoma

Table 1 Patient demographics and 5-year survival n (%)

Characteristic	Value	5-yr survival
Gender Male Female	793 (76.8) 240 (23.2)	43.1%47.2%
Age, yr Median (range) ≤ 60 > 60	63 (27-81) 688 (66.6)345 (33.4)	44.6%42.9%
Cigarette smoking Yes No	544 (52.7) 489 (47.3)	42.7%45.5%
Alcohol consumption Yes No	272 (26.3)761 (73.7)	43.6%44.1%
pT 1 2 3 4	198 (19.2) 238 (23.0)575 (55.7)22(2.1)	74.6%47.3%32.8%15.6%
pN 0 1 2 3	544 (52.7)269 (26.0)152 (14.7)68 (6.6)	52.1%46.7%25.3%11.8%
pM 0 1	998 (96.6)35 (3.4)	45.2%9.1%
Histologic grade Well differentiated (G1) Moderately differentiated (G2) Poorly differentiated (G3)	288 (27.9)489 (47.3)256 (24.8)	43.3%45.8%41.4%
Cancer location Upper thoracic Middle thoracic Lower thoracic + GEJ	206 (19.3) 603 (58.6)224 (22.2)	47.6%44.2%40.3%
Type of surgical approach Left thoracic Right thoracic	126 (12.2)907 (87.8)	40.4%44.5%
Length of tumorMean (range) ≤ Mean > Mean	3.4 cm (0.4-15.0 cm)689 (66.7)344 (33.3)	44.1%43.9%
Stage IA IB IIA IIB IIIA IIIB IIIC IV	30 (2.9)144 (13.9)122 (11.8)324 (31.4)224 (21.7)106 (10.3)54 (5.2)29 (2.8)	84.9%70.9%56.2%43.3%37.9%23.3%12.9%3.4%
(neo)adjuvant therapy No Yes	760 (73.6)273 (26.4)	49.8%30.3%

GEJ: Gastroesophageal junction.