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10.11.2017 | Ausgabe 2/2018

Journal of Cancer Survivorship 2/2018

Bright light therapy improves cancer-related fatigue in cancer survivors: a randomized controlled trial

Zeitschrift:
Journal of Cancer Survivorship > Ausgabe 2/2018
Autoren:
Jillian A. Johnson, Sheila N. Garland, Linda E. Carlson, Josée Savard, J. Steven A. Simpson, Sonia Ancoli-Israel, Tavis S. Campbell

Abstract

Purpose

Cancer-related fatigue (CRF) is a common and distressing symptom that can persist after cancer treatment has concluded. Bright light therapy has shown preliminary efficacy in reducing CRF, but its impact on other psychosocial factors is unclear. The purpose was to examine the impact of a 1-month light therapy intervention on fatigue, mood, and quality of life in cancer survivors with fatigue.

Methods

This 4-week blinded randomized controlled trial recruited cancer survivors who met diagnostic criteria for CRF. Participants were randomly assigned to receive a light therapy device that produced either bright white light (BWL; intervention) or dim red light (DRL; active control). Participants were instructed to use the device daily for 30 min upon waking for 28 days. The primary outcome, fatigue, was assessed weekly. Secondary outcomes assessed pre- and post-intervention included mood, depressive symptoms, and quality of life.

Results

A total of 81 participants were randomly assigned to receive BWL (n = 42) or DRL (n = 39). Analyses revealed a group-by-time interaction for fatigue (p = .034), wherein the BWL condition reported a 17% greater reduction in fatigue than those in the DRL condition (between group d = .30). There were also significant improvements over time for both groups on measures of mood, depressive symptoms, and quality of life (p’s < .01).

Conclusions

BWL was associated with greater improvements in fatigue and both groups displayed improvements on secondary psychosocial outcomes.

Implications for cancer survivors

These findings, along with previous reports of light therapy for CRF, support the use of this intervention to improve fatigue in cancer survivors.

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