Tai chi for breast cancer patients: a systematic review |
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Authors: | Myeong Soo Lee Tae-Young Choi Edzard Ernst |
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Institution: | (1) Division of Standard Research, Korea Institute of Oriental Medicine, 461-24, Jeonmin-dong, Yuseong-gu, Daejeon, 305-811, South Korea;(2) Complementary Medicine, Peninsula Medical School, Universities of Exeter & Plymouth, Exeter, UK |
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Abstract: | The objective of this review was to assess the effectiveness of tai chi for supportive breast cancer care. Eleven databases
were searched from inception through December 2009. Controlled trials testing tai chi in patients with breast cancer that
assessed clinical outcome measures were considered. The selection of studies, data extraction, and validations were performed
independently by two reviewers. Risk of bias was assessed using Cochrane criteria. Three randomized clinical trials (RCTs)
and four non-randomized controlled clinical trials (CCTs) met our inclusion criteria. The three RCTs tested the effects of
tai chi on breast cancer care compared with walking exercise, psychological support therapy, or spiritual growth or standard
health care and showed no significant differences between tai chi and these control procedures in quality of life and psychological
and physical outcome measures. The meta-analysis also failed to demonstrate significant effects of tai chi compared with control
interventions (n = 38, SMD, 0.45, 95% CI −0.25 to 1.14, P = 0.21; heterogeneity: χ2 = 0.23, P = 0.63; I
2 = 0%). All of the four CCTs showed favorable effects of tai chi. Three trials suggested effectiveness in psychological and
physical outcome measures, whereas one study was too poorly reported to be evaluated in detail. All of the CCTs had a high
risk of bias. Collectively, the existing trial evidence does not show convincingly that tai chi is effective for supportive
breast cancer care. Future studies should be of high methodological quality, with a particular emphasis on including an adequate
control intervention. |
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