The Different Dose-Volume Effects of Normal Tissue Complication Probability Using LASSO for Acute Small-Bowel Toxicity during Radiotherapy in Gynecological Patients with or without Prior Abdominal Surgery

Table 2

Dosimetric candidate predictive factors initially.

Volumes	Group 0			Group 1
	Range	Median	Logistic correlation	Range	Median	Logistic correlation
V4 Gy	76–990	460	−0.009	65–772	329	−0.039
V8 Gy	65–889	422	0.016	39–700	297	0.043
V12 Gy	57–824	385	−0.094	27–665	276	−0.042
V16 Gy	51–772	348	0.166	20–634	255	0.050
V20 Gy	15–721	230	−0.003	13–603	175	−0.021
V24 Gy	6–678	177	−0.001	12–578	135	0.026
V28 Gy	4–651	138	−0.033	10–324	111	−0.023
V32 Gy	3–611	115	0.055	8–296	102	0.069
V36 Gy	1–584	104	0.024	4–274	96	−0.407
V40 Gy	0–545	89	−0.063	1–249	77	0.740

V4~V40 Gy: the range of small-bowel volume in 𝑥 Gy of dose; group 0: patients without prior abdominal surgery; group 1: patients with prior abdominal surgery.