By a News Reporter-Staff News Editor at Heart Disease Weekly -- Investigators discuss new findings in Clinical Research. According to news reporting from Geneva, Switzerland, by NewsRx journalists, research stated, "To conduct a systematic review of the literature and meta-analyses to fill the gaps in knowledge on potassium intake and health. Cochrane Central Register of Controlled Trials, Medline, Embase, WHO International Clinical Trials Registry Platform, Latin American and Caribbean Health Science Literature Database, and the reference lists of previous reviews."
The news correspondents obtained a quote from the research from the Department of Nutrition for Health and Development, "Randomised controlled trials and cohort studies reporting the effects of potassium intake on blood pressure, renal function, blood lipids, catecholamine concentrations, all cause mortality, cardiovascular disease, stroke, and coronary heart disease were included. Potential studies were independently screened in duplicate, and their characteristics and outcomes were extracted. When possible, meta-analysis was done to estimate the effects (mean difference or risk ratio with 95% confidence interval) of higher potassium intake by using the inverse variance method and a random effect model. 22 randomised controlled trials (including 1606 participants) reporting blood pressure, blood lipids, catecholamine concentrations, and renal function and 11 cohort studies (127,038 participants) reporting all cause mortality, cardiovascular disease, stroke, or coronary heart disease in adults were included in the meta-analyses. Increased potassium intake reduced systolic blood pressure by 3.49 (95% confidence interval 1.82 to 5.15) mm Hg and diastolic blood pressure by 1.96 (0.86 to 3.06) mm Hg in adults, an effect seen in people with hypertension but not in those without hypertension. Systolic blood pressure was reduced by 7.16 (1.91 to 12.41) mm Hg when the higher potassium intake was 90-120 mmol/day, without any dose response. Increased potassium intake had no significant adverse effect on renal function, blood lipids, or catecholamine concentrations in adults. An inverse statistically significant association was seen between potassium intake and risk of incident stroke (risk ratio 0.76, 0.66 to 0.89). Associations between potassium intake and incident cardiovascular disease (risk ratio 0.88, 0.70 to 1.11) or coronary heart disease (0.96, 0.78 to 1.19) were not statistically significant. In children, three controlled trials and one cohort study suggested that increased potassium intake reduced systolic blood pressure by a non-significant 0.28 (-0.49 to 1.05) mm Hg. High quality evidence shows that increased potassium intake reduces blood pressure in people with hypertension and has no adverse effect on blood lipid concentrations, catecholamine concentrations, or renal function in adults. Higher potassium intake was associated with a 24% lower risk of stroke (moderate quality evidence)."
According to the news reporters, the research concluded: "These results suggest that increased potassium intake is potentially beneficial to most people without impaired renal handling of potassium for the prevention and control of elevated blood pressure and stroke."
For more information on this research see: Effect of increased potassium intake on cardiovascular risk factors and disease: systematic review and meta-analyses. Bmj, 2013;346():f1378. (BMJ Publishing Group - group.bmj.com/; Bmj - casereports.bmj.com/)
Our news journalists report that additional information may be obtained by contacting N.J. Aburto, Nutrition Policy and Scientific Advice Unit, Dept. of Nutrition for Health and Development, World Health Organization, 20 Avenue Appia, 1211 Geneva 27, Switzerland. Additional authors for this research include S. Hanson, H. Gutierrez, L. Hooper, P. Elliott and F.P Cappuccio (see also Clinical Research).
Keywords for this news article include: Geneva, Europe, Kidney, Stroke, Cardiology, Nephrology, Switzerland, Hemodynamics, Hypertension, Heart Disease, Blood Pressure, Catecholamines, Renal Function, Gastroenterology, Clinical Research, Biogenic Monoamines, Risk and Prevention, Cardiovascular Diseases, Clinical Trials and Studies.
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