|
NO.
|
Age ranges (years)
|
Radiation dose (Gy)
|
Xerostomia degree
|
|---|
|
R
|
L
|
Pre-RT
|
Post-RT
|
|---|
|
1
|
51–60
|
28.5
|
27.5
|
0
|
1
|
|
2
|
61–70
|
25.6
|
26.9
|
0
|
2
|
|
3
|
41–50
|
26.0
|
25.9
|
0
|
1
|
|
4
|
41–50
|
25.8
|
25.0
|
0
|
2
|
|
5
|
51–60
|
25.5
|
25.9
|
0
|
1
|
|
6
|
21–30
|
32.6
|
34.3
|
0
|
1
|
|
7
|
51–60
|
30.4
|
33.2
|
0
|
2
|
|
8
|
61–70
|
30.3
|
29.9
|
0
|
1
|
|
9
|
61–70
|
27.7
|
28.8
|
0
|
1
|
|
10
|
41–50
|
28.1
|
28.1
|
0
|
1
|
|
11
|
51–60
|
31.0
|
29.7
|
0
|
2
|
|
12
|
51–60
|
30.8
|
31.5
|
0
|
2
|
|
13
|
41–50
|
29.0
|
28.8
|
0
|
2
|
|
14
|
41–50
|
27.6
|
27.0
|
0
|
1
|
|
15
|
51–60
|
29.9
|
30.9
|
0
|
2
|
|
16
|
41–50
|
25.3
|
24.8
|
0
|
2
|
|
17
|
41–50
|
25.8
|
26.7
|
0
|
2
|
|
18
|
41–50
|
28.9
|
27.9
|
0
|
1
|
- NPC nasopharyngeal carcinoma, pre-RT approximately 2 weeks before radiotherapy (RT), post-RT approximately 4 weeks after RT, R right parotid gland, L left parotid gland. Xerostomia degree was evaluated by the acute radiation morbidity scoring criteria proposed by the Radiation Therapy Oncology Group (RTOG)
