Table 2.

Indicator weights obtained by Relief-F

Attributes	Weights
ctvalue	−2.8871
prevma	−3.3417
arrhythmia	−4.4444
age	−4.6933
bmi	−6.7295
size	−9.2895
asa	−13.3596
preblood	−19.3992
hypertension	−22.7188
dm	−23.1212
necrosis	−24.2869
surgeryapproach	−26.2391
preablock	−27.0017
chd	−27.0591
precrystal	−27.1358
precolloid	−27.1396
side	−27.5089
sex	−28.2274