Previous studies have shown that the green tea that Asians often drink has a protective effect on cardiovascular disease (CVD). For example, people who drink 3-5 cups of green tea a day in Japan can reduce the risk of CVD death by 465,438+0% compared with people who don't drink tea. Meta-analysis also shows that moderate coffee consumption is associated with lower mortality of all-cause mortality and cardiovascular diseases.
So for patients with thrombotic diseases such as stroke or myocardial infarction (MI), will long-term drinking of green tea or coffee also affect the survival and prognosis of patients? Recently, a study published in Stroke assessed the relationship between the intake of green tea and coffee and the mortality of patients with stroke or myocardial infarction (MI).
In this cooperative cohort study in Japan, 462 13 participants (478 stroke survivors, 65438 myocardial infarction survivors+0214,44521no stroke or myocardial infarction) were included. The baseline age of these participants (1988- 1990) was 40-79 years old, and they were followed up until 2009 to investigate their lifestyle, diet and medical history. After the median follow-up of 18.5 years, * * * recorded 9253 cases.
Compared with non-drinkers, the death risk of stroke survivors who drink 1-6 cups of green tea per week can be reduced by 27%(HR 0.73, 95% CI: 0.42 ~ 1.27), while drinking 1-2 cups, 3-4 cups, 5-6 cups and 7 cups per day can.
For survivors of myocardial infarction, the researchers observed a similar negative correlation. Drinking 1-6 cups of green tea per week and 1-2 cups, 3-4 cups, 5-6 cups and 7 cups of green tea per day reduced the risk of death by 26% respectively (HR 0.74, 95% CI: 0.49 ~ 1.6438).
However, for participants with no history of stroke or myocardial infarction, the correlation between drinking green tea and all-cause death is not obvious, and their hazard ratios (HR) are 0.96, 0.96, 0.97, 0.94 and 0.92, respectively (Table 1).
Different from green tea, the influence of coffee on all-cause death is mainly manifested in people who have no history of stroke or myocardial infarction. Compared with people who don't drink coffee, people who drink 1-6 cups of coffee a week can reduce their death risk by 14%(HR 0.86, 95% CI: 0.82-0.9 1), and their daily death risk can be reduced by1.
For survivors of myocardial infarction, drinking coffee is also related to their survival and prognosis. Drinking 1-6 cups a week, 1 cup a day and 2 cups of coffee can reduce the risk of death by 3 1%(HR 0.69), 22%(HR 0.78) and 39%(HR 0.6 1) respectively.
However, for stroke survivors, the correlation between drinking coffee and the risk of death is not obvious.
Studies have shown that the intake of green tea is negatively correlated with all-cause mortality, especially among survivors of stroke or myocardial infarction, but there is no correlation among people without a history of stroke or myocardial infarction. Researchers believe that the cardiovascular protection of green tea may come from its rich polyphenols.
In addition, this study shows that coffee intake is negatively correlated with all-cause death, mainly in people without stroke or myocardial infarction and myocardial infarction survivors; However, there is no obvious correlation with reducing the risk of death of stroke survivors. Researchers believe that excessive drinking of coffee by stroke survivors may increase the risk of hypertension, which is not good for patients.
This observation shows that drinking green tea is beneficial to the secondary prevention of cardiovascular diseases, while drinking coffee is also beneficial to the primary prevention of cardiovascular diseases. More research is needed to confirm the protective effects of green tea and coffee on the heart and nerves of cardiovascular survivors.