Cardiovascular diseases (CVD), which include cerebrovascular disease, coronary heart disease, and peripheral arterial diseases, are major contributors to the global disease burden. The overall incidence rate of CVD was 235.5 per 100,000 in 2010 in the United States [1]. Previous research has provided evidence that several dietary factors are related to the risk of CVD, such as diets high in sodium and fat, which have been associated with higher risk of CVD [1]. It is of interest to identify associations with other dietary factors that may reduce the risk of CVD.
Green tea is a common beverage that has been demonstrated to be an antioxidant and that has also been associated with anti-atherosclerosis in clinical trials [2] and [3]. Polyphenols, which are considered the effective ingredient in tea, have important roles in preventing coronary artery disease [3]. There have been several clinical trials evaluating the association between green tea consumption and coronary artery disease and ischemic related diseases [4], [5] and [6]. The main results have showed that drinking green tea could be beneficial in CVD; however, the associations between clinical outcomes and green tea consumption are inconsistent. In order to review and synthesize the current evidence for associations between green tea consumption and risk of coronary artery disease and ischemic related diseases, we conducted a meta-analysis of all available studies that were published by October 2014.
Cardiovascular diseases (CVD), which include cerebrovascular disease, coronary heart disease, and peripheral arterial diseases, are major contributors to the global disease burden. The overall incidence rate of CVD was 235.5 per 100,000 in 2010 in the United States [1]. Previous research has provided evidence that several dietary factors are related to the risk of CVD, such as diets high in sodium and fat, which have been associated with higher risk of CVD [1]. It is of interest to identify associations with other dietary factors that may reduce the risk of CVD.Green tea is a common beverage that has been demonstrated to be an antioxidant and that has also been associated with anti-atherosclerosis in clinical trials [2] and [3]. Polyphenols, which are considered the effective ingredient in tea, have important roles in preventing coronary artery disease [3]. There have been several clinical trials evaluating the association between green tea consumption and coronary artery disease and ischemic related diseases [4], [5] and [6]. The main results have showed that drinking green tea could be beneficial in CVD; however, the associations between clinical outcomes and green tea consumption are inconsistent. In order to review and synthesize the current evidence for associations between green tea consumption and risk of coronary artery disease and ischemic related diseases, we conducted a meta-analysis of all available studies that were published by October 2014.
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