Chronotype-based radiotherapy in localised prostate cancer: protocol for a prospective cohort integrating MCTQ and salivary DLMO

May 25, 2026Clinical and translational radiation oncology

Using body clock timing to plan radiation treatment for localized prostate cancer: study plan combining sleep habits and saliva hormone timing

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Abstract

A prospective observational cohort protocol evaluates whether chronotype-based radiotherapy timing reduces treatment-related toxicities in localized prostate cancer.

  • Individual circadian phase is assessed using the Munich ChronoType Questionnaire and salivary dim-light melatonin onset.
  • The primary endpoint focuses on late genitourinary toxicity grade ≥2 at 12 months.
  • Secondary endpoints include gastrointestinal toxicity and patient-reported outcomes.
  • The protocol is designed for multi-site adoption, indicating potential broader applicability.

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