Table 3.

Logistic regression model using standard selection criteria with the target parameter "SAE".

	Model	Selection criteria	Wald	p	Assessment
Needle penetration depth in the tumor (Needle tip not in the tumor is risk factor)	1	Standard	6.9	0.009	Most important independent risk factor
Intubation anesthesia (Anesthesia is risk factor)	1	Standard	5.7	0.017	Independent risk factor
Height above the level of the left atrium (Height is risk factor)	1	Standard	5.2	0.023	Independent risk factor
Prone or supine position (prone position is risk factor)	1	Standard	4.3	0.038	Independent risk factor