Table 5.

Patient and tumor characteristics and correlation between SGRT detected motion and resulting internal target motion.

	$\left|{\mathit{Shift}}_{\mathit{CBCT}}-{\mathit{Shift}}_{\mathit{SGRT}}\right|$		$\left({\mathit{Shift}}_{\mathit{CBCT}}-{\mathit{Shift}}_{\mathit{SGRT}}\right)$
	Univariable P‐value		Univariable association		Multivariable P‐value
	Slope	P‐value	Slope	P‐value	Slope	P‐value
Gender (M vs F)	−0.007	0.900	−0.145	0.076	–	–
Site		0.612		0.941	–	–
Lung vs Other	0.053		0.038		–	–
Spine vs Other	−0.054		−0.007		–	–
Site Location		0.631		0.927	–	–
Peripheral vs N/A	0.063		0.036		–	–
Central vs N/A	0.082		0.057		–	–
Age	−0.003	0.346	−0.010	0.040	–	–
BMI	−0.0001	0.969	0.015	0.005	0.019	0.001
4D ROM	−0.074	0.301	−0.015	0.899	–	–
PTV Volume	−0.001	0.664	−0.0007	0.773	−0.254	0.049
ITV Volume	−0.002	0.391	−0.0003	0.954	0.041	0.088

BMI, body mass index; SGRT, Surface‐guided radiation therapy.