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Dose-Dependent Associations of Dietary Glycemic Index, Glycemic Load, and Fiber With 3-Year Weight Loss Maintenance and Glycemic Status in a High-Risk Population: A Secondary Analysis of the Diabetes Prevention Study PREVIEW

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posted on 27.05.2021, 22:03 by Ruixin Zhu, Thomas M. Larsen, Mikael Fogelholm, Sally D. Poppitt, Pia S. Vestentoft, Marta P. Silvestre, Elli Jalo, Santiago Navas-Carretero, Maija Huttunen-Lenz, Moira A. Taylor, Gareth Stratton, Nils Swindell, Mathijs Drummen, Tanja C. Adam, Christian Ritz, Jouko Sundvall, Liisa M. Valsta, Roslyn Muirhead, Shannon Brodie, Teodora Handjieva‐Darlenska, Svetoslav Handjiev, J. Alfredo Martinez, Ian A. Macdonald, Margriet S. Westerterp-Plantenga, Jennie Brand-Miller, Anne Raben
OBJECTIVE

To examine longitudinal and dose-dependent associations of dietary glycemic index (GI), glycemic load (GL), and fiber with body weight and glycemic status during 3-year weight-loss maintenance (WLM) in high-risk adults.

RESEARCH DESIGN AND METHODS

This secondary analysis used pooled data from the PREVIEW randomized controlled trial, which was designed to test the effects of four diet and physical activity interventions. 1,279 participants with overweight or obesity (aged 25–70 years; BMI≥25 kg·m-2) and pre-diabetes at baseline were included. Multi-adjusted linear mixed models with repeated measurements were used to assess longitudinal and dose-dependent associations, by merging the participants into one group and dividing them into GI, GL, and fiber tertiles, respectively.

RESULTS

In the available-case and complete-case analyses, each 10-unit increment in GI was associated with a greater regain of weight (0.46 kg·year-1; 95% CI 0.23, 0.68; P<0.001) and increase in HbA1c. Each 20-unit increment in GL was associated with a greater regain of weight (0.49 kg·year-1; 0.24, 0.75; P<0.001) and increase in HbA1c. The associations of GI and GL with HbA1c were independent of weight change. Compared with those in the lowest tertiles, participants in the highest GI and GL tertiles had significantly higher weight regain and increases in HbA1c. Fiber was inversely associated with increases in waist circumference, but the associations with weight regain and glycemic status did not remain robust in different analyses.

CONCLUSIONS

Dietary GI and GL were positively associated with weight regain and deteriorating glycemic status. Stronger evidence on the role of fiber is needed.

Funding

EU framework programme 7 (FP7/2007-2013) grant agreement # 312057. National Health and Medical Research Council - EU Collaborative Grant, AUS 8, ID 1067711). The Glycemic Index Foundation Australia through royalties to the University of Sydney. The New Zealand Health Research Council (grant #14/191) and University of Auckland Faculty Research Development Fund. The Cambridge Weight Plan© donated all products for the 8-weeks LED period. The Danish Agriculture & Food Council. The Danish Meat and Research Institute. National Institute for Health Research Biomedical Research Centre (NIHR BRC) (UK). Biotechnology and Biological Sciences Research Council (BBSRC) (UK). Engineering and Physical Sciences Research Council (EPSRC) (UK). Nutritics (Dublin) donated all dietary analyses software used by UNOTT. Juho Vainio Foundation (FIN), Academy of Finland (grant numbers: 272376, 314383, 266286, 314135), Finnish Medical Foundation, Gyllenberg Foundation, Novo Nordisk Foundation, Finnish Diabetes Research Foundation, University of Helsinki, Government Research Funds for Helsinki University Hospital (FIN), Jenny and Antti Wihuri Foundation (FIN), Emil Aaltonen Foundation (FIN). China Scholarship Council. The funders of the study had no role in study design, data collection, data analysis, data interpretation, or writing of the report.

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