borderline significantp = 0.051
showed a trendp = 0.051
CTCAE toxicity grade before O 3 T was inversely correlated with time-lapse between the end of radiotherapy and rectal bleeding (rho = −0.588, p = 0.044) and showed a trend towards a borderline significant direct correlation with O 3 T duration (rho = 0.574, p = 0.051) and number of rectal O 3 T sessions (rho = 0.648, p = 0.059); that is, higher toxicity grade was related to earlier commencement of RB and longer treatment with O 3 T.