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Table 5 Mean rectal doses and percentage of rectal volume receiving 70 Gy (V70 Gy) values according to acute rectal toxicity grade groups.

From: Comparison of rectal volume definition techniques and their influence on rectal toxicity in patients with prostate cancer treated with 3D conformal radiotherapy: a dose-volume analysis

  Mean Rectal Dose (Gy) V70 Gy (%)
  Grade
0–1
Grade
≥ 2
p Grade
0–1
Grade
≥ 2
p
Method 1 53,4 61,0 < 0.001 27,2 42,3 < 0.001
Method 2 49,8 58,4 < 0.001 23,0 37,3 < 0.001
Method 3 44,5 52,4 < 0.001 19,8 32,5 < 0.001
Method 4 46,1 54,7 < 0.001 20,7 33,4 < 0.001