The Marsden Morbidity Index: the derivation and validation of a simple risk index scoring system using cardiopulmonary exercise testing variables to predict morbidity in high-risk patients having major cancer surgery

Table 5 Comparison in prediction strength of the model with and without CPET variables

	With CPET variables	Without CPET variables
AUC	0.81	0.64
Sensitivity	75.7%	65.4%
Specificity	73.0%	61.5%
Positive predictive value (PV)	78.5%	60.3%
Negative PV	71.2%	59.8%
Correctly classified	80.2%	62.5%

ISSN: 2047-0525