The study was conducted between 2002 and 2006 in 1,399 women who had been diagnosed with stage 0 to III breast cancer in Shanghai, China. Investigators collected lifestyle, clinical and sociodemographic information at 6 months and measured depression symptoms at 18 months after the diagnosis.
The study found that women who exercised regularly were 44% less likely to develop clinical depression than non-exercisers. Also, regular tea consumption (>100 g dried tea leaves/mo) lowered risk of depression by 61%.
Since depression is a prognostic factor for breast cancer survivor, regular exercise and tea consumption might extend survival in patients with this disease. However, a proper, well-designed clinical trial is required to confirm this hypothesis.
Chen et. al. J Clin Oncol 28:991-998. 2010
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