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Table 2 Clinical characteristics of the selected groups

From: Correlation between egfr expression and accelerated proliferation during radiotherapy of head and neck squamous cell carcinoma

Author E1 E2 BE SU SM CH
number of patients 209 803 304 148 165 533
Sex % M 74.2 81.0 72.0 90.0 66.0 79.2
F 25.8 19.0 28.0 10.0 34.0 20.8
Primary site % Oral Cavity / 12.0 13.0 50.6 100.0 10.3
Oropharynx / 52.5 28.0 / 60.4
Hypopharynx / 12.0 / / 13.7
Nasopharynx / / 3.0 / / /
Larynx 100.0 35.5 44.0 49.4 / 15.6
T stage % T1 6.0 67.0 3.0 26.1 2.0 5.8
T2 37.0 42.0 25.0 27.6
T3 35.0 33.0 33.0 73.9 28.0 37.1
T4 22.0 22.0 35.0 29.3
Tx / / / / / 0.2
N stage % N0 65.0 65.0 63.0 33.8 26.0 21.8
  N1 35.0 35.0 18.0 66.2 16.0 18.6
  N2a 15.0 1.0 9.6
  N2b 39.0 17.8
  N2c 17.0 19.3
  N3 4.0 1.0 12.9
  1. Abbreviations: E1 = Eriksen-AO, E2 = Eriksen RO, BE = Bentzen JCO, SU = Suwinski IJROBP, SM = Smid IJROBP, CH = Chung IJROBP.