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#Post#: 459--------------------------------------------------
(Abst.) Weight loss among named diet programs compared
By: agate Date: September 7, 2014, 12:50 pm
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People with MS sometimes can't exert as much as we should. So we
sit--and sometimes we put on weight. Losing it is often an
uphill battle. This study indicates that one diet is about as
effective as another, and so you should just find one you can
live with.
From JAMA, September 3, 2014:
[quote]Comparison of Weight Loss Among Named Diet Programs in
Overweight and Obese Adults--
A Meta-analysis
Bradley C. Johnston, PhD1,2,3,4; Steve Kanters, MSc5,6,7;
Kristofer Bandayrel, MPH1,4; Ping Wu, MBBS, MSc6; Faysal Naji,
BHSc8; Reed A. Siemieniuk, MD9; Geoff D. C. Ball, RD, PhD10,11;
Jason W. Busse, DC, PhD3,12,13; Kristian Thorlund, PhD3,7,14;
Gordon Guyatt, MD, MSc3; Jeroen P. Jansen, PhD7,15; Edward J.
Mills, PhD, MSc7,14
[+] Author Affiliations
1Hospital for Sick Children Research Institute, Toronto,
Ontario, Canada
2Institute of Health Policy, Management and Evaluation,
University of Toronto, Toronto, Ontario, Canada
3Department of Clinical Epidemiology and Biostatistics, McMaster
University, Hamilton, Ontario, Canada
4Department of Anesthesia and Pain Medicine, Hospital for Sick
Children, University of Toronto, Toronto, Ontario, Canada
5School of Population and Public Health, University of British
Columbia, Vancouver, Canada
6Faculty of Health Sciences, University of Ottawa, Ottawa,
Ontario, Canada
7Redwood Outcomes, Vancouver, British Columbia, Canada
8Michael G. DeGroote School of Medicine, McMaster University,
Hamilton, Ontario, Canada
9Department of Medicine, University of Toronto, Toronto,
Ontario, Canada
10Department of Pediatrics, University of Alberta, Edmonton,
Canada
11Department of Agricultural, Food and Nutritional Science,
University of Alberta, Edmonton, Canada
12Michael G. DeGroote Institute for Pain Research and Care,
McMaster University, Hamilton, Ontario, Canada
13Department of Anesthesia, McMaster University, Hamilton,
Ontario, Canada
14Stanford Prevention Research Center, Stanford University
School of Medicine, Stanford University, Stanford, California
15Department of Public Health and Community Medicine, Tufts
University, Boston, Massachusetts
Importance
Many claims have been made regarding the superiority of one diet
or another for inducing weight loss. Which diet is best remains
unclear.
Objective
To determine weight loss outcomes for popular diets based on
diet class (macronutrient composition) and named diet.
Data Sources Search of 6 electronic databases: AMED, CDSR,
CENTRAL, CINAHL, EMBASE, and MEDLINE from inception of each
database to April 2014.
Study Selection
Overweight or obese adults (body mass index ≥25)
randomized to a popular self-administered named diet and
reporting weight or body mass index data at 3-month follow-up or
longer.
Data Extraction and Synthesis
Two reviewers independently extracted data on populations,
interventions, outcomes, risk of bias, and quality of evidence.
A Bayesian framework was used to perform a series of
random-effects network meta-analyses with meta-regression to
estimate the relative effectiveness of diet classes and programs
for change in weight and body mass index from baseline. Our
analyses adjusted for behavioral support and exercise.
Main Outcomes and Measures
Weight loss and body mass index at 6- and 12-month follow-up (±3
months for both periods).
Results
Among 59 eligible articles reporting 48 unique randomized trials
(including 7286 individuals) and compared with no diet, the
largest weight loss was associated with low-carbohydrate diets
(8.73 kg [95% credible interval {CI}, 7.27 to 10.20 kg] at
6-month follow-up and 7.25 kg [95% CI, 5.33 to 9.25 kg] at
12-month follow-up) and low-fat diets (7.99 kg [95% CI, 6.01 to
9.92 kg] at 6-month follow-up and 7.27 kg [95% CI, 5.26 to 9.34
kg] at 12-month follow-up).
Weight loss differences between individual diets were minimal.
For example, the Atkins diet resulted in a 1.71 kg greater
weight loss than the Zone diet at 6-month follow-up. Between 6-
and 12-month follow-up, the influence of behavioral support
(3.23 kg [95% CI, 2.23 to 4.23 kg] at 6-month follow-up vs 1.08
kg [95% CI, −1.82 to 3.96 kg] at 12-month follow-up) and
exercise (0.64 kg [95% CI, −0.35 to 1.66 kg] vs 2.13 kg
[95% CI, 0.43 to 3.85 kg], respectively) on weight loss
differed.
Conclusions and Relevance
Significant weight loss was observed with any low-carbohydrate
or low-fat diet. Weight loss differences between individual
named diets were small. This supports the practice of
recommending any diet that a patient will adhere to in order to
lose weight.[/quote]
The abstract can probably be seen here
HTML http://jama.jamanetwork.com/article.aspx?articleID=1900510&utm_source=Silverchair%20Information%20Systems&utm_medium=email&utm_campaign=MASTER%3AJAMALatestIssueTOCNotification09%2F02%2F2014.
#Post#: 460--------------------------------------------------
Re: (Abst.) Weight loss among named diet programs compared
By: agate Date: September 7, 2014, 12:57 pm
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A bit more information in Journal Watch, September 3, 2014:
[quote]Popular Diets Similar in Terms of Weight Loss,
Meta-Analysis Finds
By Amy Orciari Herman
Edited by David G. Fairchild, MD, MPH, and Lorenzo Di Francesco,
MD, FACP, FHM
Popular branded low-carbohydrate and low-fat diets lead to
significant weight loss, with little difference between the two
approaches, according to a network meta-analysis in JAMA.
Researchers examined data from 48 randomized trials that studied
various popular diets among roughly 7300 overweight or obese
adults. They found that all diets were superior to no
intervention. In particular, low-carb programs (e.g., Atkins)
and low-fat approaches (e.g., Ornish) yielded the greatest
weight loss at 6 months (roughly 8 kg versus no diet), with
minimal differences among the individual diets. Weight loss at 6
months was somewhat lower with moderate macronutrient diets
(e.g., Weight Watchers), at just under 7 kg.
The authors say their analysis "supports the practice of
recommending any diet that a patient will adhere to in order to
lose weight."
[/quote]
The article can be seen here
HTML http://www.jwatch.org/fw109244/2014/09/03/popular-diets-similar-terms-weight-loss-meta-analysis?query=pfw.
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