Skip to main content

Table 3 Rectum RTOG, Anterior Rectal Wall RTOG, Rectum Partial, Anterior Rectal Wall Partial DVH Analysis and Univariate Associations with Grade ≥ 2 GI Toxicities

From: Acute gastrointestinal and genitourinary toxicity of image-guided intensity modulated radiation therapy for prostate cancer using a daily water-filled endorectal balloon

Grade ≥ 2 Combined GI/rectal Rectum Infield Rectum Anterior Rectal Wall Infield Anterior Rectal Wall
  Mean ± SD P value Mean ± SD P value Mean ± SD P value Mean ± SD P value
Volume (cm3) 167.1 ± 31.4 0.57 131.5 ± 25.3 0.59 26.9 ± 5.7 0.63 20.7 ± 4.6 0.54
Dmin (Gy) 4.2 ± 3.7 0.64 12.3 ± 4.6 0.08 5.8 ± 5.8 0.87 20.6 ± 7.3 0.17
Dmax (Gy) 81.8 ± 1.7 0.44 81.8 ± 1.7 0.44 81.8 ± 1.7 0.40 81.8 ± 1.7 0.40
Dmean (Gy) 36.0 ± 5.1 0.28 42.1 ± 4.1 0.04 54.2 ± 7.1 0.82 64.6 ± 3.1 0.48
Dmedian (Gy) 31.7 ± 5.9 0.09 35.9 ± 5.2 0.03 60.5 ± 8.7 0.91 70.9 ± 4.4 0.73
V10 (%) 87.4 ± 10.4 0.99 99.3 ± 2.1 0.64 88.6 ± 10.1 0.81 99.9 ± 0.3 NA
V20 (%) 77.1 ± 14.5 0.46 91.5 ± 11.6 0.21 84.7 ±11.2 0.92 99.6 ± 1.3 0.39
V30 (%) 57.1 ± 14.5 0.08 69.2 ± 15.3 0.02 80.8 ± 11.5 0.79 97.6 ± 3.4 0.30
V40 (%) 35.4 ± 7.6 0.13 43.4 ± 8.4 0.046 72.8 ± 11.5 0.76 89.6 ± 6.0 0.35
V50 (%) 24.2 ± 4.5 0.53 29.9 ± 4.8 0.24 62.1 ± 10.4 0.95 77.5 ± 7.2 0.90
V60 (%) 17.0 ± 3.0 0.85 21.3 ± 3.3 0.48 51.8 ± 9.2 0.91 65.6 ± 7.2 0.96
V65 (%) 14.0 ± 2.5 0.87 17.5 ± 2.9 0.51 46.6 ± 8.5 0.98 59.3 ± 7.1 0.81
V70 (%) 10.9 ± 2.2 0.86 13.7 ± 2.7 0.54 40.8 ± 8.1 0.95 52.2 ± 7.5 0.71
V75 (%) 7.2 ± 2.2 0.74 9.1 ± 2.7 0.55 32.2 ± 8.4 0.75 41.4 ± 9.4 0.58
V79.2 (%) 2.4 ± 2.1 0.49 3.0 ± 2.5 0.37 12.7 ± 9.8 0.42 16.4 ± 12.2 0.31
  1. Abbreviations: DVH = dose volume histogram; Dmin = minimum dose; Dmedian = median dose; Dmean = mean dose; Dmax = maximum dose; V10, V20, V30, V40, V50, V60, V65, V70, V75, V79.2 = volume receiving 10 Gy, 20 Gy, 30 Gy, 40 Gy, 50 Gy, 60 Gy, 65 Gy, 70 Gy, 75 Gy, 79.2 Gy, respectively.
  2. Note: The results are presented as mean ± standard deviation. The results listed as NA were not estimated due to the limited number of variations in the tested parameter.