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

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

λ Value	Selected physical variable	Weight for variable	Equation Intercept	MSE	R²
0.055	Abdominal girth	-0.017599	0.5922	0.0087	0.8070
0.055	Vertebral column length	0.055117	0.5922	0.0087	0.8070
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

ISSN: 1471-2253