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Table 4 Receiver operating characteristic curve analysis of dosimetric parameters of rectal wall volume for late rectal bleeding in the anticoagulant and non-anticoagulant groups

From: Patient-related risk factors for late rectal bleeding after hypofractionated radiotherapy for localized prostate cancer: a single-center retrospective study

Rectal dose (EQD2)

Non-AC

AC

Cutoff point

AUC (95% CI)

P value

Cutoff point

AUC (95% CI)

P value

V77 Gy

5.3%

0.601 (0.490–0.712)

0.035

4.5%

0.715 (0.579–0.850)

0.002

V47.9 Gy

18.8%

0.573 (0.455–0.690)

0.099

19.6%

0.623 (0.482–0.764)

0.048

V19.5 Gy

36.8%

0.539 (0.424–0.653)

0.247

41.9%

0.603 (0.464–0.742)

0.082

V8.2 Gy

87.4%

0.512 (0.398–0.625)

0.419

71.0%

0.657 (0.525–0.788)

0.017

  1. AC, anticoagulant; AUC, area under the receiver operating characteristic curve; CI, confidence interval; EQD2; equivalent dose at fractionation of 2 Gy
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Radiation Oncology

ISSN: 1748-717X

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