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Table 2 Treatment parameters

From: Definitive radiotherapy for early stage glottic cancer by 6 MV photons

Parameters Stage T1N0 Stage T2N0
  (433) Patients (%) (262) Patients (%)
Field size (cm2)   
< 30.5 215 (49.6) 0
30.5- 35.5 165 (38.1) 106 (40.4)
≥ 35.5 53 (12.2) 156 (59.5)
A. Dose fraction size   
2.5 Gy 177 (40.8) 86 (32.8)
Total dose (Gy)   
55 30 (6.9) 7 (2.7)
57.5 134 (30.9) 63 (24.0)
60 13 (3.0) 16 (6.1)
Tx duration (days)   
30 25 (5.7) 22 (8.4)
31-34 141 (32.5) 45 (17.1)
≥ 35 11 (2.5) 19 (7.2)
BEDcGy15 (cGy)   
Median 6520 6580
range 6058- 6820 6160- 6820
B. Dose fraction size   
2.0 Gy 256 (59.1) 176 (67.1)
Total dose (Gy)   
64 52 (12.0) 24 (9.1)
66 202 (46.6) 109 (41.6)
68 2 (0.46) 2 (0.7)
70 0 41 (15.6)
Tx duration (days)   
≤45 48 (11.0) 18 (6.8)
46- 50 203 (46.8) 110 (42.0)
≥ 51 5 (1.15) 48 (18.3)
BEDcGy15 (cGy)   
Median 6340 6520
range 6040- 6700 6040- 6910
  1. Abbreviations: Tx = treatment; BED = biologically effective dose.