Clinical Trials of Integrative Oncology Interventions for Radiation Therapy: Emerging Evidence and Opportunities

Integrative oncology interventions for patients undergoing radiation therapy (RT) may relieve symptoms (including procedural anxiety) and improve quality of life, though gaps remain in the evidence base to adequately guide implementation efforts. In this article we review clinical trials specifically for psychological (ie, mindfulness), physical (ie, exercise, acupuncture), and combination approaches (ie, yoga, tai chi, and qigong), in which several symptom-based clinical outcomes are impacted (ie, fatigue, sleep disturbance, pain, mood, and xerostomia). We identified at least 90 clinical trials and 15 systematic reviews and meta-analyses related to this topic, but note the predominance of early-phase investigations and some heterogeneity in study findings. We also assess opportunities across the radiation treatment continuum, noting most interventions were targeted during active radiation treatment. Future research ought to leverage novel hybrid study designs and multi-center community-based clinical settings (including cooperative groups) to confirm effectiveness and generalizability of findings of existing earlier phase clinical trials. Meanwhile, opportunities to improve clinical trial efficiency such as integrating advanced practice providers and patient-reported outcomes in routine care should be considered. As a field with procedural elements, established symptom trajectories, and often daily patient engagement, radiation oncology is poised to develop and implement interventions that advance symptom science and clinical outcomes for patients with cancer.