[Retracted] Dose Prediction Models Based on Geometric and Plan Optimization Parameter for Adjuvant Radiotherapy Planning Design in Cervical Cancer Radiotherapy

Table 5

Univariate and multivariate linear regression significance scores for prediction of the rectum dose.

Variables	Outcome	value	R^2	value	R^2
	variable	(univariate)	(univariate)	(multivariate)	(multivariate)
PTV volume	V30	0.057	0.092	N	N
	V35	0.151	0.039	N	N
	V40	0.378	0.028	N	N
	D2cc	0.772	0.033	N	N
Rectal volume	V30	0.235	0.016	N	N
	V35	0.197	0.025	N	N
	V40	0.212	0.021	N	N
	D2cc	0.036	0.117	N	N
OV of rectum	V30	0.235	0.016	N	N
	V35	0.068	0.082	N	N
	V40	0.017	0.156	0.266	0.993
	D2cc	<0.001	0.543	<0.001	0.543
OP of rectum	V30	0.002	0.26	<0.001	0.997
	V35	<0.001	0.454	<0.001	0.995
	V40	<0.001	0.612	<0.001	0.993
	D2cc	0.002	0.272	N	N
V30 of NOS rectum	V30	<0.001	0.955	<0.001	0.997
V35 of NOS rectum	V35	<0.001	0.919	<0.001	0.995
V40 of NOS rectum	V40	<0.001	0.843	<0.001	0.993
D2cc of NOS rectum	D2cc	0.008	0.196	0.811	0.527

^∗OV: the volume of the overlap of the OAR with the PTV; OP: the percentage volume of the overlap of the OAR; NOS rectum: the structure of the rectum outside the PTV; N indicated that this parameter did not participate in the multivariate linear regression analysis.