Table 6. Correlations between body weight or body volume variations and absolute value of intra-fractional variations.

Absolute value		ΔRL(mm)	ΔSI(mm)	ΔAP(mm)	Δpitch(°)	Δroll(°)	Δyaw(°)	Δ3D(mm)
Body weight variations	rho	-0.110	-0.039	-0.137	-0.027	-0.145	-0.080	-0.156
	p	0.016	0.394	0.003	0.558	0.002	0.079	0.001
	N	479	479	479	479	479	479	479
Body volume variations	rho	-0.108	-0.190	-0.081	-0.146	-0.033	-0.117	-0.189
	p	0.006	0.000	0.040	0.000	0.405	0.003	0.000
	N	635	635	635	635	635	635	635

Abbreviations: ΔRL, variation of right-left; ΔSI, variation of superior-inferior; ΔAP, variation of anterior-posterior; Δpitch, variation of pitch; Δroll, variation of roll; Δyaw, variation of yaw; 3D, three dimensional