Table 4.

Logistic regression model using explorative 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)	2	Explorative	9.1	0.002	Most important independent risk factor
Intubation anesthesia (Anesthesia is risk factor)	2	Explorative	6.8	0.009	Independent risk factor
Height above the level of the left atrium (Height is risk factor)	2	Explorative	6.0	0.014	Independent risk factor
Needle angle to the tumor surface (More acute angle may be risk factor)	2	Explorative	4.6	0.032	Independent risk factor
Prone or supine position (prone position is risk factor)	2	Explorative	3.3	0.067	Independent risk factor
Needle path through ventilated lung	2	Explorative	2.9	0.085	Independent risk factor