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Table 2 Parameter selection of lasso regression and model evaluation for different parameters

From: A prediction model using machine-learning algorithm for assessing intrathecal hyperbaric bupivacaine dose during cesarean section

λ Value

Selected physical variable

Weight for variable

Equation Intercept

MSE

R2

0.055

Abdominal girth

-0.017599

0.5922

0.0087

0.8070

Vertebral column length

0.055117

0.038

Height

0.000141

0.5071

0.0086

0.8108

Abdominal girth

− 0.018174

Vertebral column length

0.057225

0.031

Height

0.000286

0.4516

0.0085

0.81199

Weight

−0.000171

Abdominal girth

−0.018232

Vertebral column length

0.058107

0.020

Height

0.000618

0.3687

0.00844

0.81325

Weight

−0.000600

Fundal height

−0.001253

Abdominal girth

−0.017910

Vertebral column length

0.059371

  1. MSE Mean-square error, R2 Coefficient of determination