One or two drinks a day can raise the risk of developing hypertension in some men, according to two Japanese studies.
The studies, published in the July issue of Alcohol: Clinical Experience and Research, found that men who had as few as one or two glasses of alcohol on a regular basis had a much higher incidence of hypertension than those who did not drink at all.
Several U.S. studies have found that moderate drinking habits can actually decrease the risk of heart disease. American studies have also found that regular alcohol consumption does not affect hypertension risk below a threshold of three to six drinks.
Two general differences between Japanese and American populations may help explain the aberrant findings of these studies.
First, there is significantly more obesity in the United States than in the Japanese population. A higher blood-alcohol level can be expected in a lower-weight population at similar drinking levels, potentially resulting in a lower threshold effect.
Second, about 50 percent of Japanese people have a genetic defect that affects the metabolism of alcohol. However, recent studies of this defect have found no effect on risk of hypertension.
In the first Japanese study, Susumu Ohmori, M.D., and colleagues at Kyushu University found that up to a point, the incidence of hypertension rose with the amount of alcohol men drank.
Ex-drinkers, who had not had a drink within three months, were still nearly twice as likely to develop hypertension as men who did not drink at all. Those who drank a moderate amount on a regular basis had an even higher incidence and those who had more than a couple of drinks a day had about a threefold higher incidence of high blood pressure than non-drinkers.
The study included 1,101 residents of Hisayama Town, a suburban community. The researchers studied the subjects over a 10-year span. The study included men and women, but the heightened risk of hypertension was found only in the men.
Ohmori and colleagues say, "Regular drinking, including even low levels of consumption, was found to be a significant risk factor for the onset of hypertension in a general population of Japanese men."
The second study included only male office workers, but produced strikingly similar results.
Men who averaged even just one drink a day had a 20 percent to 30 percent increased incidence of hypertension, depending on their age at the beginning of the study. The more they drank, the higher their risk, falling just shy of a threefold increase among the heaviest drinkers, found Noriyuki Nakanishi, M.D., of Osaka University Graduate School of Medicine, and associates.
The study included 3,784 men who did not have hypertension at the beginning of the study. Nearly 1,000 developed hypertension during four years of follow-up.
Both studies note that they lacked any dietary or nutritional information on their subjects, another possible source of hypertension risk.
However, Nakanishi and colleagues conclude that their findings "suggest that the risk for hypertension increases in a dose-dependent manner as alcohol intake increases in both young and middle-aged Japanese men and that light to moderate alcohol consumption has an important influence on [blood pressure] in Japanese men."
The study was funded by the Arteriosclerosis Prevention Association in Tokyo.
New study: How does Europe become a leading player for software and IT services?
03.04.2017 | Fraunhofer-Institut für System- und Innovationsforschung (ISI)
Reusable carbon nanotubes could be the water filter of the future, says RIT study
30.03.2017 | Rochester Institute of Technology
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.
In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
24.05.2017 | Physics and Astronomy
24.05.2017 | Physics and Astronomy
24.05.2017 | Event News