Table 1.

Basic characteristics of patients undergoing totally minimally invasive, hybrid or open Ivor Lewis oesophagectomy

	TMIE	Hybrid †	Open
	(n = 1472)	(n = 1364)	(n = 1897)
Age (years) *	65 (58–71)	64 (57–71)	65 (58–71)
Women	269 (18)	241 (18)	332 (18)
Co-morbidities present	920 (63)	1183 (87)	1468 (77)
WHO performance status
0	841 (57)	617 (45)	1029 (54)
1	580 (39)	571 (42)	798 (42)
2	48 (3.3)	130 (9.5)	60 (3)
3	3 (<1)	45 (3.3)	10 (<1)
4	0 (0)	1 (<1)	0 (0)
ASA fitness grade
I	145 (9.9)	118 (8.7)	158 (8)
II	667 (45)	758 (56)	875 (46)
III	632 (43)	487 (36)	860 (45)
IV	28 (1.9)	1 (<1)	3 (<1)
V	0 (0)	0 (0)	1 (<1)
Tumour location
Proximal 1/2 of esophagus	41 (2.8)	81 (5.9)	68 (4)
Distal 1/2 of esophagus	852 (58)	757 (56)	863 (46)
GOJ	558 (38)	505 (37)	920 (49)
Missing	21 (1.4)	21 (1.5)	46 (2)
Histology
Adenocarcinoma	895 (61)	732 (54)	1072 (57)
Squamous cell carcinoma	146 (9.9)	134 (9.8)	191 (10)
Adenosquamous cell carcinoma	6 (<1)	3 (<1)	9 (<1)
Missing	425 (29)	495 (36)	625 (33)
Clinical T category‡
cT0	4 (<1)	5 (<1)	3 (<1)
cTis	7 (<1)	4 (<1)	15 (<1)
cT1	139 (9.4)	91 (6.7)	131 (7)
cT2	258 (18)	166 (12)	278 (15)
cT3	944 (64)	1043 (77)	1302 (69)
cT4	77 (5.2)	26 (1.9)	90 (5)
cTx	22 (1.5)	8 (<1)	32 (2)
Missing	21 (1.4)	21 (1.5)	46 (2)
Clinical N category‡
cN0	544 (37)	236 (17)	728 (38)
cN1	554 (38)	403 (30)	690 (36)
cN2	226 (15)	100 (7.3)	284 (15)
cN3	32 (2.2)	11 (<1)	61 (3)
cNx	95 (6.5)	593 (44)	88 (5)
Missing	21 (1.4)	21 (1.5)	46 (2)
Preoperative treatment
None	265 (18)	234 (17)	354 (19)
Chemoradiotherapy	973 (66)	683 (50)	765 (40)
Chemotherapy	212 (14)	424 (31)	731 (39)
Radiotherapy	1 (<1)	2 (<1)	1 (<1)
Missing	21 (1.4)	21 (1.5)	46 (2.4)

Values in parentheses are percentages unless indicated otherwise;

*values are median (i.q.r.).

^†Laparoscopically assisted oesophagectomy (laparoscopy and thoracotomy).

^‡Clinical Tumor and Nodal stage. TMIE, totally minimally invasive oesophagectomy; GOJ, gastro-oesophageal junction.