Toxicity and patient-reported outcomes after moderately hypofractionated radiotherapy (60 Gy in 20 fractions) for prostate cancer: prospective observational study.

The incidence of late GI toxicity was 30.0% (9/30 patients) in the non-spacer group and 14.3% (4/28 patients) in the spacer group, showing a trend toward a lower incidence in the spacer group; however, this difference did not reach statistical significance ( P = 0.152).

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