Skip to main content

Table 1 P atients and tumor characteristics

From: Normal tissue complication probability model parameter estimation for xerostomia in head and neck cancer patients based on scintigraphy and quality of life assessments

Characteristic Value-n(%)
Age (y)
Mean 53
Range 28-78
Gender (n)
Female 1 (3.2)
Male 30 (96.8)
Tumor site
NPC 11 (35.5)
Oral cavity 14 (45.2)
Oropharynx 4 (12.9)
Larynx 1 (3.2)
Parotid 1 (3.2)
Stage (TNM staging system)
T1 3 (9.7)
T2 12 (38.7)
T3 6 (19.4)
T4 7 (22.6)
Not applicable/Recurrent 3 (9.6)
N0 16 (51.7)
N1 5 (16.1)
N2 7 (22.6)
N3 0 (0.0)
Not applicable/Recurrent 3 (9.6)
Dose, Gy/# fractions
  14 (45.2) 69.2/38
  1 (3.2) 54.8/30
  9 (29.1) 59.4/33
  4 (12.9) 57.6/32
  1 (3.2) 68.4/38
  1 (3.2) 70.8/35
  1 (3.2) 52.2/29
Parotid gland mean dose
Ipsilateral, mean (range) 51.7 (26.9-74.8) Gy
Contralateral, mean (range) 36.7 (7.6-57.6) Gy
Surgery before RT
Yes 16 (51.6)
No 15 (48.4)
Chemotherapy
Yes 19 (61.3)
No 12 (38.7)
SEF recovery*
Grade 3+ xerostomia 10 (16.1)
No grade 3+ xerostomia 52 (83.9)
QoL measurement*
Grade 3+ xerostomia 6 (19.4)
No grade 3+ xerostomia 25 (80.6)
  1. *SEF recovery and QoL measurement was at 1-year after RT. Grade 3+: grade 3.
  2. Abbreviation: RT radiotherapy, SEF salivary excretion factorm, QoL quality of life.