Published in:
Open Access
01-12-2015 | Original investigation
Isocaloric substitution of carbohydrates with protein: the association with weight change and mortality among patients with type 2 diabetes
Authors:
Marjo JE Campmans-Kuijpers, Ivonne Sluijs, Ute Nöthlings, Heinz Freisling, Kim Overvad, Elisabete Weiderpass, Guy Fagherazzi, Tilman Kühn, Verena A Katzke, Amalia Mattiello, Emily Sonestedt, Giovanna Masala, Claudia Agnoli, Rosario Tumino, Annemieke MW Spijkerman, Aurelio Barricarte, Fulvio Ricceri, Saioa Chamosa, Ingegerd Johansson, Anna Winkvist, Anne Tjønneland, Diewertje Sluik, Heiner Boeing, Joline WJ Beulens
Published in:
Cardiovascular Diabetology
|
Issue 1/2015
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Abstract
Background
The health impact of dietary replacement of carbohydrates with protein for patients with type 2 diabetes is still debated. This study aimed to investigate the association between dietary substitution of carbohydrates with (animal and plant) protein and 5-year weight change, and all-cause and cardiovascular (CVD) mortality risk in patients with type 2 diabetes.
Methods
The study included 6,107 diabetes patients from 15 European cohorts. Patients with type 1 diabetes were excluded. At recruitment, validated country-specific food-frequency questionnaires were used to estimate dietary intake. Multivariable adjusted linear regression was used to examine the associations between dietary carbohydrate substitution with protein and 5-year weight change, and Cox regression to estimate hazard ratios (HRs) for (CVD) mortality.
Results
Annual weight loss of patients with type 2 diabetes was 0.17 (SD 1.24) kg. After a mean follow-up of 9.2 (SD 2.3)y, 787 (13%) participants had died, of which 266 (4%) deaths were due to CVD. Substitution of 10 gram dietary carbohydrate with total (ß = 187 [75;299]g) and animal (ß = 196 [137;254]g) protein was associated with mean 5-year weight gain. Substitution for plant protein was not significantly associated with weight change (β = 82 [−421;584]g). Substitution with plant protein was associated with lower all-cause mortality risk (HR = 0.79 [0.64;0.97]), whereas substitution with total or animal protein was not associated with (CVD) mortality risk.
Conclusions
In diabetes patients, substitution with plant protein was beneficial with respect to weight change and all-cause mortality as opposed to substitution with animal protein. Therefore, future research is needed whether dietary guidelines should not actively promote substitution of carbohydrates by total protein, but rather focus on substitution of carbohydrates with plant protein.