Denise Shuk Ting Cheung1, Naomi Takemura1, Robert Smith1, Wing Fai Yeung2, Xinyi Xu1, Alina Yee Man Ng1, Shing Fung Lee3, Chia-Chin Lin4. 1. School of Nursing, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong. 2. School of Nursing, The Hong Kong Polytechnic University, Hong Kong. 3. Department of Clinical Oncology, Tuen Mun Hospital, New Territories West Cluster, Hospital Authority, Hong Kong. 4. School of Nursing, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong; School of Nursing, College of Nursing, Taipei Medical University, Taiwan; Alice Ho Miu Ling Nethersole Charity Foundation Professor in Nursing, Hong Kong. Electronic address: cclin@hku.hk.
Abstract
OBJECTIVES: To examine the effects of qigong interventions on sleep disturbance-related symptom clusters for cancer patients and to explore the possible mediating role of fatigue and depression in affecting sleep. METHODS: In this systematic review and meta-analysis, a systematic search was conducted through October 2020 by searching multiple English and Chinese databases. Inclusion was limited to randomized controlled trials that measured the effect of qigong on sleep and fatigue/depressive symptoms in cancer patients. Eleven studies involving 907 cancer patients were included in the systematic review, whereas the meta-analysis included ten studies with 851 cancer patients. RESULTS: The most commonly investigated form of qigong was Taichi, and the intervention length ranged from 10 days to 6 months. All studies employed self-reported measurements. Overall, qigong significantly improved sleep (SMD = -1.28, 95% CI: -2.01, -0.55) and fatigue (SMD = -0.89, 95% CI: -1.59, -0.19) in cancer patients post-intervention, but not depressive symptoms (SMD = -0.69, 95% CI: -1.81, 0.42). Notably, the benefits on sleep and fatigue became non-significant after 3 months. Qigong's effect on sleep was significantly mediated by its effect on fatigue (β = 1.27, SE = 0.24, p = 0.002), but not depressive symptoms (β = 0.53, SE = 0.26, p = 0.106). CONCLUSIONS: Qigong can be recommended for improving sleep disturbance-fatigue symptom clusters in the cancer population, while qigong's benefit on sleep is likely based on its effect on reducing fatigue. Future qigong studies should adopt more rigorous design and employ strategies to maintain longevity of intervention benefits.
OBJECTIVES: To examine the effects of qigong interventions on sleep disturbance-related symptom clusters for cancerpatients and to explore the possible mediating role of fatigue and depression in affecting sleep. METHODS: In this systematic review and meta-analysis, a systematic search was conducted through October 2020 by searching multiple English and Chinese databases. Inclusion was limited to randomized controlled trials that measured the effect of qigong on sleep and fatigue/depressive symptoms in cancerpatients. Eleven studies involving 907 cancerpatients were included in the systematic review, whereas the meta-analysis included ten studies with 851 cancerpatients. RESULTS: The most commonly investigated form of qigong was Taichi, and the intervention length ranged from 10 days to 6 months. All studies employed self-reported measurements. Overall, qigong significantly improved sleep (SMD = -1.28, 95% CI: -2.01, -0.55) and fatigue (SMD = -0.89, 95% CI: -1.59, -0.19) in cancerpatients post-intervention, but not depressive symptoms (SMD = -0.69, 95% CI: -1.81, 0.42). Notably, the benefits on sleep and fatigue became non-significant after 3 months. Qigong's effect on sleep was significantly mediated by its effect on fatigue (β = 1.27, SE = 0.24, p = 0.002), but not depressive symptoms (β = 0.53, SE = 0.26, p = 0.106). CONCLUSIONS: Qigong can be recommended for improving sleep disturbance-fatigue symptom clusters in the cancer population, while qigong's benefit on sleep is likely based on its effect on reducing fatigue. Future qigong studies should adopt more rigorous design and employ strategies to maintain longevity of intervention benefits.