Table 3. Correlations between body weight or body volume variations and inter-fractional variations.

		ΔRL(mm)	ΔSI(mm)	ΔAP(mm)	Δpitch(°)	Δroll(°)	Δyaw(°)	Δ3D(mm)
Body weight variations	rho	0.166	-0.027	-0.157	-0.195	-0.019	-0.030	-0.026
	p	0.000	0.547	0.001	0.000	0.677	0.508	0.569
	N	484	484	484	484	484	484	484
Body volume variations	rho	0.018	0.038	-0.041	-0.102	0.011	-0.052	0.062
	p	0.652	0.335	0.304	0.009	0.783	0.190	0.116
	N	646	646	646	646	646	646	646

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