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 1
Characteristics of patients.
Group 0 () Number (%)
Group 1 () Number (%)
value
Age (y)
0.031
Mean
60.1
54.9
Range
29–90
32–75
<50
16 (26)
9 (26)
51–60
18 (30)
15 (45)
61–70
11 (18)
9 (26)
>70
16 (26)
1 (3)
BMI
0.360
Mean
24.9
25.7
Range
16.6–35.1
20.1–34.5
<20
8 (13)
0 (0)
20–26
27 (44)
20 (59)
>26
26 (43)
14 (41)
Stage
0.007
I-II
52 (85)
19 (56)
III-IV/recurrent
9 (15)
15 (44)
Diabetes
0.763
No
52 (85)
30 (88)
Yes
9 (15)
4 (12)
Hypertension
0.779
No
50 (82)
29 (85)
Yes
11 (18)
5 (15)
Chemoradiotherapy
0.013
No
15 (25)
17 (50)
Yes
46 (75)
17 (50)
External beams doses (Gy)
0.469
WP 19.8, PM/LP 32.4
0 (0)
1 (2.9)
WP 39.6
20 (33)
5 (14.7)
WP 39.6, PM/LP 45
27 (44)
23 (67.6)
WP 39.6, LP 50.4
0 (0)
2 (5.9)
WP 45
4 (7)
1 (2.9)
WP 45, PM/LP 50 4
10 (16)
2 (5.9)
Group 0: patients without prior abdominal surgery; group 1: patients with prior abdominal surgery; BMI: body mass index; WP: whole pelvis; LP: low pelvis; PM: parametrium. Differences between the group 0 and group 1 cohort were described with an independent sample -test for continuous variables and chi-square test for dichotomous variables.
