Vascular calcification does not predict anastomotic leak or conduit necrosis following oesophagectomy

Table 3 Disease and treatment-related factors

	n	Statistic
Neoadjuvant chemotherapy	413
No		69 (16.7)
Yes		344 (83.3)
Mandard score	387
Mandard 1 (Complete)		20 (5.2)
Mandard 2		26 (6.7)
Mandard 3		69 (17.8)
Mandard 4		115 (29.7)
Mandard 5 (None)		88 (22.7)
No Chemo		69 (17.8)
Operation stages	413
Two-stage		379 (91.8)
Three-stage		34 (8.2)
Operation type	413
Hybrid		224 (54.2)
MIO		103 (24.9)
Open		86 (20.8)
Type of Tumour	409
Adenocarcinoma		322 (78.7)
Adenosquamous		8 (2.0)
Squamous		65 (15.9)
Other		14 (3.4)
T-stage	410
T0		17 (4.1)
T1		43 (10.5)
T2		51 (12.4)
T3		274 (66.8)
T4		25 (6.1)
N-stage	412
N0		154 (37.4)
N1		171 (41.5)
N2		54 (13.1)
N3		33 (8.0)
M-stage	405
M0		396 (97.8)
M1		9 (2.2)
R-status	407
R0		255 (62.7)
R1		141 (34.6)
R2		11 (2.7)
Peri-neural invasion	314
No		207 (65.9)
Yes		107 (34.1)
Lymph nodes total	412	30.3 ± 10.8
Lymph nodes involved	412	1 (0-4)

Data are reported as n (%), mean ± SD, or as median (IQR), as applicable. Mandard Score is a measure of tumour regression due to chemotherapy, with a score of 1 being complete regression, and 5 being no regression. MIO: Minimally invasive oesophagectomies.