Study Strengthens Link Between Low Dietary Fiber Intake and Increased Cardiovascular Risk
Philadelphia, PA, October 18, 2013
in The American Journal of Medicine
Results reported in The American Journal of Medicine
A new study published in the December issue of The American Journal of Medicine shows a
significant association between low dietary fiber intake and cardiometabolic
risks including metabolic syndrome, cardiovascular inflammation, and obesity.
Surveillance data from 23,168 subjects in the National Health and Nutrition
Examination Survey (NHANES) 1999-2010 was used to examine the role dietary
fiber plays in heart health.
In the current study investigators have taken a closer look at possible sex, age, racial/ethnic, and socioeconomic disparities in dietary fiber consumption, as well as examined the association between dietary fiber intake and various cardiometabolic risk factors.
Dietary fiber, which previous studies have shown may assist in lowering blood pressure, cholesterol levels, and inflammation, is thought to play an important role in reducing cardiovascular risk. Despite this knowledge, investigators found that dietary fiber intake was consistently below recommended intake levels for NHANES participants.
The Institute of Medicine defines recommended intake levels according to age and sex: 38g per day for men aged 19-50 years, 30g per day for men 50 and over, 25g for women aged 19-50 years, and 21g per day for women over 50. Using data from NHANES 1999-2010, the study reveals that the mean dietary fiber intake was only 16.2g per day across all demographics during that time period.
"Our findings indicate that, among a nationally representative sample of nonpregnant US adults in NHANES 1999-2010, the consumption of dietary fiber was consistently below the recommended total adequate intake levels across survey years," says senior investigator Cheryl R. Clark, MD, ScD, Center for Community Health and Health Equity, Brigham and Women's Hospital and Harvard Medical School, Boston. "Our study also confirms persistent differences in dietary fiber intake among socioeconomic status and racial/ethnic subpopulations over time."
The research team found variations according to race and ethnicity, with Mexican-Americans consuming higher amounts of dietary fiber and non-Hispanic blacks consuming lower amounts of dietary fiber compared with non-Hispanic whites.
The study highlights the importance of increasing dietary fiber intake for US adults by showing a correlation between low dietary fiber and an increased risk for cardiovascular risk. Participants with the highest prevalence of metabolic syndrome, inflammation, and obesity were in the lowest quintile of dietary fiber intake.
"Overall, the prevalence of the metabolic syndrome, inflammation, and obesity each decreased with increasing quintiles of dietary fiber intake," comments Clark. "Compared with participants in the lowest quintile of dietary fiber intake, participants in the highest quintile of dietary fiber intake had a statistically significant lower risk of having the metabolic syndrome, inflammation, and obesity."
This new data analysis emphasizes the importance of getting adults across diverse ethnicities to increase their dietary fiber intake in order to try and mitigate the risk for cardiovascular damage.
"Low dietary fiber intake from 1999-2010 in the US and associations between higher dietary fiber and a lower prevalence of cardiometabolic risks suggest the need to develop new strategies and policies to increase dietary fiber intake," adds Clark. "Additional research is needed to determine effective clinical and population-based strategies for improving fiber intake trends in diverse groups."
# # #
Notes for editors
"Dietary Fiber Intake and Cardiometabolic Risks Among US Adults, NHANES 1999-2010," by Kya N. Grooms, BA; Mark J. Ommerborn, MPH; Do Quyen Pham, MPH; Luc Djousse, MD, ScD, MPH; Cheryl R. Clark, MD, ScD. (DOI: http://dx.doi.org/10.1016/j.amjmed.2013.07.023). It appears in The American Journal of Medicine, Volume 126, Issue 12 (December 2013) published by Elsevier.
Full text of the article is available to credentialed journalists upon request. Contact Jane Grochowski at +1 215 239 3712 or email@example.com to obtain copies. Journalists wishing to interview the authors should contact Lori J. Schroth, Manager, Media Relations, Communication & Public Affairs, Brigham and Women's Hospital, at +1 617 534 1604 (office), +1 617 459 2111 (cell), or firstname.lastname@example.org.
About The American Journal of Medicine
The American Journal of Medicine (http://www.amjmed.com), known as the "Green Journal," is one of the oldest and most prestigious general internal medicine journals published in the United States. It has an Impact Factor of 4.768, which ranks it 13 out of 151 General and Internal Medicine titles according to the 2012 Journal Citation Reports® published by Thomson Reuters.
AJM, the official journal of The Association of Professors of Medicine, a group comprised of chairs of departments of internal medicine at 125-plus U.S. medical schools, publishes peer-reviewed, original scientific studies that have direct clinical significance. The information contained in this article in The American Journal of Medicine is not a substitute for medical advice or treatment, and the Journal recommends consultation with your physician or healthcare professional. AJM is published by Elsevier.
Elsevier is a world-leading provider of information solutions that enhance the performance of science, health, and technology professionals, empowering them to make better decisions, deliver better care, and sometimes make groundbreaking discoveries that advance the boundaries of knowledge and human progress. Elsevier provides web-based, digital solutions — among them ScienceDirect, Scopus, Elsevier Research Intelligence, and ClinicalKey — and publishes nearly 2,200 journals, including The Lancet and Cell, and over 25,000 book titles, including a number of iconic reference works.
The company is part of Reed Elsevier Group PLC, a world leading provider of professional information solutions in the Science, Medical, Legal and Risk and Business sectors, which is jointly owned by Reed Elsevier PLC and Reed Elsevier NV. The ticker symbols are REN (Euronext Amsterdam), REL (London Stock Exchange), RUK and ENL (New York Stock Exchange).
Jane Grochowski, Publisher
+1 215 239 3712