The study found that over the past four years, if the average daily intake of coffee increases a cup and a half, the incidence of type diabetes is reduced by 11%, which certainly reduces the risk of disease type diabetes. Coffee and tea intake and increased incidence of type diabetes associated with a reduction, but it is the inner mechanism of this association is poorly understood, until now, the mystery was finally solved.
Recently released study on "Diabetes Learning" (Diabetologia) magazine EASD, said in a four-year period, if the average daily intake of coffee increased by half a cup (about 360 ml), which the incidence of diabetes is reduced by 11%. Frank Harvard University School of Public Health, Dr. Hu, Dr. Shilpa Bhupathiraju and colleagues led the study.
Coffee and tea intake and increased incidence of type diabetes associated with a reduction, but it is the inner mechanism of this association is poorly understood. On changes in coffee and tea intake in just four years, four years and then contact the diabetes incidence between type were investigated.
On the observational data used in the analysis process from the United States three prospective studies: the Nurses' Health Study (NHS) (1986-2006, the object of female nurses 30-55 years old), NHS II (1991-2007, subject to 25 42 year-old young woman nurse) as well as health professionals follow-up study (HPFS) (1986-2007, object 40-75 year old male professionals). In 20 years, researchers have two to four years will be diet, lifestyle, environment, drugs and other chronic conditions details of these objects to be collected every.
Through these repeated measurements and long-term follow-up, the author will analyze the relationship between people in the four years between changes in coffee and tea intake and the next four years, the incidence of type II diabetes. They also investigated the caffeinated and decaffeinated coffee if there are different effects on the incidence of diabetes. By quadrennial food intake frequency questionnaire, the researchers evaluated data on the diet. And the subsequent supplementary questionnaire, respondents were asked to fill out whether they are suffering from type II diabetes. The final analysis combines the NHS in 48,464 women, the survey data in the NHS II 47 510 women and 27 759 men in the HPFS included.
On the recorded 7269 cases of type II diabetes, found in a four-year period, increased coffee intake participants (increasing the average daily intake of 1 cup or more, the median increase 1.69 cups / day) they followed in the four years the incidence of type II diabetes than coffee intake did not change in 11% fewer participants. Coffee intake has decreased participants (average daily intake of a cup or more reduction, the median reduction of 2 cups / day), they are more likely to develop Type II diabetes will increase 17%. The intake of tea and the incidence of type II diabetes is no contact.
The highest intake of coffee and be able to maintain this state who - due to their intake will be 3 or more cups of coffee a day, it is called "high stability of consumer" - its prevalence of type II diabetes lowest, than the "low stability of consumers" (intake cup or less of coffee per day) for a 37 percent lower.
On that increase the incidence of type II diabetes and related reduction in coffee intake, which represents the risk would vary under the influence of this factor in the coffee, but maybe this link is subject to some kind of inverse the potential impact of the causal event: a patient suffering from a disease (such as high blood pressure, cholesterol, cardiovascular disease or cancer) is often accompanied by the risk of type II diabetes, and they are taking drugs to reduce the intake of coffee. However, even if the exclusion of people with cardiovascular disease or cancer cases in the follow-up, the results will not be much change.
Although decaffeinated coffee intake and substantially reduce the incidence of type II diabetes related, but change its intake does not affect the incidence of the disease. As tea intake, the authors said: "We found no change tea intake in type II diabetes four years affect the incidence of evidence of this may be due to our respondents in a four-year period. variations in tea intake is not, and therefore they can not be entirely related statistics between the two, while respondents generally low intake of tea is also one of the reasons. "
The authors say: "In the three survey teams, the researchers on more than 1.6 million participants were followed up for many years, we have observed that in a four-year period, an increase in the intake of coffee, tea while the no increase in the intake of people who have a lower incidence of type II diabetes in the next four years, coffee intake and reduce the incidence of type II diabetes more relevant. we also found that caffeinated coffee changing intake affects the incidence of type II diabetes, and change the amount of decaffeinated coffee intake of it and are not, which is the initial intake of coffee, as well as in four other dietary impact. . and lifestyle changes do not care "they added:" the coffee consumption habits change will affect the incidence of diabetes in a relatively short period of time our findings confirm that higher coffee intake was associated with lower. type II diabetes-related morbidity and we also presented new evidence that coffee consumption habits change with the incidence of diabetes-related. "
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