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Table 1 Patient characteristics

From: Assessment and topographic characterization of locoregional recurrences in head and neck tumours

Characteristic N (%)
Gender  
Male 308 (83.9)
Female 59 (16.1)
Site  
  Larynx 84 (22.9)
  Oral cavity 74 (20.2)
  Oropharynx 70 (19.1)
  Nasopharynx 45 (12.3)
  Pharyngeal-laryngeal 38 (10.4)
  Hypopharynx 27 (7.4)
  Others 29 (7.9)
T stage  
1-2 188 (51.8)
3-4 175 (48.2)
N stage  
0-1 164 (45.2)
2-3 199 (54.8)
AJCC stage  
  I 37 (10.2)
  II 34 (9.4)
  III 69 (19.1)
  IV 222 (61.3)
Type treatment  
Post-operative 151 (41.1)
Definitive 216 (58.9)
RT Treatment technique  
3DCRT 57 (15.5)
dIMRT 98 (26.7)
rIMRT 155 (42.2)
IMRT 57 (15.5)
  1. 3DCRT stands for 3D Conformal RT, dIMRT stands for forward optimized IMRT (using 15-25 segments), rIMRT refers to inversely optimized IMRT planned with a small number of segments (30-55 segments) while IMRT was planned with about 70-80 segments.