Table 4.

Analysis of factors associated with a greater than median average displacement (0.6 mm)

Characteristic	Category	Odds ratio (95% CI)	P-value
Age	<65	Ref
	>65	0.722 (0.207-2.512)	0.608
Bite block	No	Ref
	Yes	0.144 (0.008-2.568)	0.187
Mask Type	Green	Ref
	Yellow	1.004 (0.310-3.247)	0.995
Number of Treatments	1	Ref
	>1	0.901 (0.305-2.664)	0.851
BMI	<24.9	Ref
	>24.9	1.805 (0.593-5.489)	0.298
ECOG	<1	Ref
	>1	10.982 (2.472-39.051)	0.001
Gender	Female	Ref
	Male	5.609 (1.392-22.610)	0.015
Tumor pathology	Benign	Ref
	Malignant	11.051 (2.071-58.983)	0.005
Treatment time (minutes)	<23	Ref
	>23	0.936 (0.304-2.881)	0.909
Anxiolytic use	No	Ref
	Yes	0.156 (0.037-0.662)	0.012
Clearance check	No	Ref
	Yes	2.737 (0.499-15)	0.246

Logistic regression analysis of average displacement > 0.6 mm with regard to patient and treatment characteristics. ECOG >1, male gender, malignant tumor pathology, and lack of anxiolytic use (noted in bold font) showed significant association with increased average displacement.