Nomographic predictive models for complications after minimally invasive esophagectomy: Current status and future perspectives

Table 7 A hypothetical nomogram model for prediction of post minimally invasive esophagectomy complications proposed by the authors (needs predictive performance validation)

Risk factor	Criteria	Score
Age	< 65 years	0
	> 65 years	1
Gender	Female	0
	Male	1
ASA score	≤ Grade 2	0
	> Grade 2	1
ECOG status	≤ 1	0
	1-2	1
	> 2	3
Diabetes or cardiac co-morbidities	No	0
	Yes	1
BMI	18.5-25	0
	> 25	1
Smoking/tobacco use	No	0
	Yes	1
Hemoglobin levels	> 8 g/dL	0
	< 8 g/dL	1
Serum albumin	> 3.5	0
	< 3.5	1
Tumour size	< 4 cm	0
	> 4 cm	1
Tumour location	Middle or lower thoracic esophagus	0
	Cervical or upper thoracic esophagus	1
Tumour T stage	≤ 2	0
	> 2	1
Neoadjuvant chemoradiotherapy	No	0
	Yes	1
Surgical approach	Minimally invasive	0
	Open	1
Lymphadenectomy type	Standard or extended 2 field	0
	Total 2 field/3 field	1
Conduit type	Gastric	0
	Non-gastric	1
Anastomosis level	Intrathoracic	0
	Cervical	1

ASA: American Society of Anesthesia; ECOG: Eastern Cooperative Oncology Group; BMI: Body mass index.