Applying machine learning methods to predict operative mortality after tricuspid valve surgery

The Cardiothoracic Surgeon

Table 3 LASSO identified variables and their coefficients

Variables	LASSO coefficient	Elastic net coefficient
Emergency surgery	0.912	0.866
COPD	0.881	0.855
Age ≥ 70 years	0.685	0.647
Reoperative surgery	0.633	0.564
Hypertension	0.586	0.533
Heart failure within 1 year	0.483	0.470
Moderate/severe RV dysfunction	0.392	0.399
Nonobese	0.373	0.361
Tricuspid valve replacement	0.311	0.309
Diabetes mellitus	0.288	0.304
CKD grade 4	0.292	0.302
PASP ≥ 50 mmHg	0.223	0.248
Endocarditis	0.130	0.246
Isolated tricuspid valve surgery	-	0.107
Beating tricuspid surgery	-	0.067
NYHA III-IV	-	0.047
Moderate/severe RV dilatation	-	0.012

CKD Chronic kidney disease, COPD Chronic obstructive pulmonary disease, NYHA New York Heart Association, PASP Pulmonary artery systolic pressure, RV Right ventricle