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Updated: Jun 9, 2025

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Evaluating the Role of Mitochondrial Function in Cancer-related Fatigue
Published on: May 17, 2018
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Randomized Controlled Trial of Acceptance and Commitment Therapy for Fatigue Interference With Functioning in
Catherine E Mosher1, Shieun Lee2,3, Elizabeth L Addington4
1Department of Psychology, Indiana University Indianapolis, Indianapolis, IN.
Summary
Acceptance and Commitment Therapy (ACT) significantly reduced fatigue interference in metastatic breast cancer (MBC) patients. This brief, telephone-delivered intervention improved functioning and quality of life, offering a new management strategy.
Area of Science:
- Oncology
- Psychological Interventions
- Patient-Reported Outcomes
Background:
- Fatigue is a prevalent and debilitating symptom in patients with metastatic breast cancer (MBC).
- Limited evidence-based interventions exist for managing fatigue in advanced cancer populations.
- This study addresses the need for effective fatigue management strategies in MBC.
Purpose of the Study:
- To evaluate the efficacy of Acceptance and Commitment Therapy (ACT) in reducing fatigue interference.
- To assess ACT's impact on functioning in patients with metastatic breast cancer (MBC).
- To compare ACT with an education/support intervention in a phase II randomized controlled trial.
Main Methods:
- A phase II randomized controlled trial involving women with stage IV breast cancer and moderate to severe fatigue.
- Patients received either six weekly telephone-delivered ACT sessions or education/support.
- Outcomes included fatigue interference, mood, cognition, sleep interference, daily activity engagement, and quality of life (QOL).
Main Results:
- ACT significantly reduced fatigue interference with functioning compared to education/support (P = .018) at 2 weeks and 6 months.
- ACT patients demonstrated significantly better functional QOL at 2 weeks and 6 months postintervention (P = .006).
- While not statistically significant after adjustment, ACT showed a trend towards reduced sleep interference.
Conclusions:
- A brief, telephone-delivered ACT intervention effectively reduces fatigue interference in patients with MBC.
- ACT improves functional quality of life in this patient population.
- This intervention offers a promising, accessible approach for managing cancer-related fatigue.

