The effects of physical activity on overall survival among advanced cancer patients: a systematic review and meta-analysis

作者：Naomi Takemura, Siu Ling Chan, Robert Smith, Denise Shuk Ting Cheung, Chia‐Chin Lin · 发表于：BMC Cancer · 年份：2021 · DOI：10.1186/s12885-021-07988-1 · 被引用次数：39 · 研究领域：Cancer survivorship and care、Physical Activity and Health、Nutrition and Health in Aging

BACKGROUND: The survival rates of advanced cancer patients remain low despite clinical therapy advancements. However, physical activity showed promising effects in improving cancer outcomes. This review aimed to systematically evaluate and synthesize the effects on overall mortality of post-diagnosis physical activity in advanced cancer patients. METHODS: A systematic search of six English databases (PubMed, EMBASE, CINAHL, PsycINFO, The Cochrane Central Register of Controlled Trials, and SPORTDiscus) was conducted from their inception up to 3 February 2021. The association of physical activity with survival was evaluated by combining study-specific hazard ratios with random-effects meta-analysis models. RESULTS: Eleven studies were identified. Compared with the reference group, higher-level physical activity was not significantly associated with a lower risk of earlier mortality in advanced cancer patients (InHR = - 0.18, 95% CI, - 0.36 to 0.01). When separated by study type, a higher level of physical activity in non-randomised trials was significantly associated with reduced mortality risk (InHR = - 0.25, 95% CI: - 0.44, - 0.06). However, in randomised trials, engaging in exercise was not significantly associated with a lower mortality risk compared with the control group (InHR = 0.08, 95%CI: - 0.17, 0.32). CONCLUSIONS: Discrepancies were uncovered in the effect of physical activity on overall survival in randomised and non-randomised trials. In non-randomised trials, a hi...