Combined and intraoperative risk modelling for oesophagectomy: A systematic review

Table 3 Clinical credibility of combined and intraoperative models

Model	Ref.	Oesophageal specific	No thresholds	Timely data	Reliable data	Easy to generate	Understandable	Useful range	Total
POSSUM	Copeland et al[46], 1991	No	No	No	Yes	Yes	Yes	Yes	4
O-POSSUM	Tekkis et al[48], 2004	Partly	No	No	Yes	Yes	Yes	Yes	4.5
P-POSSUM	Prytherch et al[47], 1998	No	No	No	Yes	Yes	Yes	Yes	4
E-PASS	Haga et al[49], 1999	No	Yes	No	Partly	No	Partly	Yes	3
Yoshida score	Yoshida et al[28], 2014	Yes	No	No	Yes	Yes	Yes	No	4
Xi SAS nomogram	Xi et al[29], 2020	Yes	No	No	Partly	Yes	Yes	Yes	4.5
Xi IPF nomogram	Xi et al[30], 2019	Yes	No	No	Partly	Yes	Yes	Yes	4.5
Huang Model	Huang et al[31], 2020	Yes	No	No	Yes	Yes	Yes	Yes	5
SAS	Gawande et al[50], 2007	No	No	No	Partly	Yes	Yes	Yes	3.5
eSAS	Janowak et al[26], 2015	Yes	No	No	Partly	Yes	Yes	Yes	4.5
Modified eSAS	Stroyer et al[27], 2017	Yes	No	No	Partly	Yes	Yes	Yes	4.5

POSSUM: Physiological and operative severity score for the enumeration of mortality and morbidity; P-POSSUM: Portsmouth physiological and operative severity score for the enumeration of mortality and morbidity; O-POSSUM: Oesophagogastric physiological and operative severity score for the enumeration of mortality and morbidity; E-PASS: Estimation of physiologic ability and surgical stress; SAS: Surgical Apgar score; eSAS: Esophagectomy surgical Apgar score.