Table 6.

Summary of the performance for all preoperative models in predicting perioperative major morbidity

Ref.	Predictive model	Discrimination	Calibration	Outcome
Ferguson et al[45], 2011	Amsterdam score	AUC = 0.653	Not stated	Major morbidity
Wright et al[33], 2009	Original STS model	AUC = 0.621	Not reported	Major morbidity or mortality
Filip et al[36], 2015	PNI multivariate	AUC = 0.80	HL P value (0.67)	Major morbidity
Raymond et al[37], 2016	Revised STS model	AUC = 0.63	Not reported	Major morbidity
Saito et al[39], 2019	PPCS model	AUC = 0.798	Not reported	Major morbidity

AUC: Area under the receiver operating characteristic curve; HL: Hosmer-Lemeshow; O:E: Observed:expected ratio; PPCS: Predicting postoperative complications score; STS: Society of Thoracic Surgeons Oesophagectomy Composite Score; PNI: Prognostic nutritional index.