Are there differences in health-related quality of life between men with low-risk prostate cancer who are treated with hypofractionated vs conventional radiotherapy?
In this phase 3 randomized clinical trial of 962 trial participants, treatment with hypofractionated radiotherapy was found to be noninferior to conventional radiotherapy in men with low-risk prostate cancer in terms of disease-free survival with no differences in prostate cancer–specific (eg, bowel, bladder, sexual) and general quality of life, as well as in anxiety and depression.
Level 1 evidence affirms hypofractionated radiotherapy as a new practice standard for men with localized prostate cancer.
Hypofractionated radiotherapy (HRT) would be more convenient for men with low-risk prostate cancer and cost less than conventional radiotherapy (CRT) as long as HRT is noninferior to CRT in terms of survival and quality of life (QOL) is not found to be worse.
To assess differences in QOL between men with low-risk prostate cancer who are treated with HRT vs CRT.
Design, Setting, and Participants
In this phase 3 randomized clinical trial, men with low-risk prostate cancer were enrolled from sites within the National Cancer Institute’s National Clinical Trials Network in the United States, Canada, and Switzerland.
Random assignment to CRT (73.8 Gy in 41 fractions over 8.2 weeks) or to HRT (70 Gy in 28 fractions over 5.6 weeks).
Main Outcomes and Measures
Quality of life was assessed using the Expanded Prostate Index Composite questionnaire measuring bowel, urinary, sexual, and hormonal domains; the 25-item Hopkins Symptom Checklist measuring anxiety and depression; and the EuroQol–5 Dimension questionnaire measuring global QOL. All data were collected at baseline and 6, 12, 24, and 60 months. Change scores were compared between treatment arms using the Wilcoxon signed rank test. A significance level of .0125 to adjust for multiple comparisons was used for an overall 2-sided type 1 error of .05. Clinical significance was determined for the Expanded Prostate Index Composite change scores by an effect size of 0.5.
Of 1092 patients analyzable for the primary end point, 962 (mean [SD] age, 66.6 [7.4] years) consented to the QOL component. No statistically significant differences with regard to baseline characteristics nor any of the QOL baseline domains were measured between arms. There were no differences in change score between arms with respect to any of the Expanded Prostate Index Composite questionnaire domain scores except at 12 months when the HRT arm had a larger decline than the CRT arm in the bowel domain (mean score, −7.5 vs −3.7, respectively; P<.001), but it did not reach clinical significance (effect size = 0.29). There were no differences between arms at any time point for the Hopkins Symptom Checklist nor EuroQol–5 Dimension questionnaire.
Conclusions and Relevance
Treatment with HRT is noninferior to CRT in men with low-risk prostate cancer in terms of disease-free survival and, as shown in the present study, in prostate cancer–specific (eg, bowel, bladder, sexual) and general QOL, as well as in anxiety and depression. This study provides evidence to affirm that HRT is a practice standard for men with low-risk prostate cancer.
ClinicalTrials.gov identifier: NCT00331773
Bruner DW, Pugh SL, Lee WR, et al. Quality of Life in Patients With Low-Risk Prostate Cancer Treated With Hypofractionated vs Conventional Radiotherapy: A Phase 3 Randomized Clinical Trial. JAMA Oncol. Published online February 14, 20195(5):664–670. doi:10.1001/jamaoncol.2018.6752
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