Table 7.

Results of t‐test comparing the means of setup error in initial and trial groups.

	Baseline Adjusted Using Image Guidance				Baseline Set From First Fraction
Site	${\mathit{t}}_{\mathit{vertical}}$	${\mathit{t}}_{\mathit{long}}$	${\mathit{t}}_{\mathit{lat}}$	${\mathit{t}}_{\mathit{threshold}}$	${\mathit{t}}_{\mathit{vertical}}$	${\mathit{t}}_{\mathit{long}}$	${\mathit{t}}_{\mathit{lat}}$	${\mathit{t}}_{\mathit{threshold}}$
Lung	0.72	0.68	$-1.04$	1.96	4.10 a	4.13 a	−2.74 a	1.96
H&N	$-0.18$	$-0.02$	$-0.26$	1.96	−3.12 a	3.03 a	4.56 a	1.96
Breast	−3.47 a	0.58	0.81	1.97	−9.72 a	4.78 a	0.81	1.97
Pelvis	0.02	0.93	$-0.55$	1.97	1.87	3.01 a	−3.67 a	1.97
Abdomen	$-0.06$	1.01	0.22	1.97	0.37	−3.40 a	−6.02 a	1.97

^aValues are above t‐test threshold indicating a significant difference in means between initial and trial groups.