Association of high carbohydrate versus high fat diet with glycated hemoglobin in high calorie consuming type 2 diabetics

Journal of Diabetes & Metabolic Disorders

Saeed Hoseini²  Bagher Larijani²  Maryam Omidvar¹  Mahdieh Akhoundan²  Nooshin Poorsoltan²  Mohsen Khoshniat²  Zhaleh Shadman² 

[1] Diabetes Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran;Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Research Institute, Tehran University of Medical Sciences, Tehran, Iran

关键词: Fat;    Carbohydrate;    Dietary saturated fatty acid;    Diabetes;   

Others  :  806986
DOI  :  10.1186/2251-6581-12-27

 received in 2013-01-16, accepted in 2013-05-27,  发布年份 2013

【 摘 要 】

Background

Since both dietary carbohydrate and fatty acids separately affect carbohydrate metabolism, how dietary macronutrients distribution may have different effects on carbohydrate metabolism pathways and regulation of blood glucose especially in diabetic patients.

Methods

In this cross-sectional study 750 type 2 diabetic patients (261 men and 489 women, aged 35–65 years),who at least two years were followed in Diabetes and Metabolic disease Clinic of Tehran University of Medical Sciences, were recruited according to inclusion and exclusion criteria by simple sampling. Dietary data were collected by a validated food frequency questionnaire. Other variables were anthropometric measurements, Stress, physical activity level, Biochemical analyses including fasting and postprandial plasma glucose, Glycated hemoglobin, total cholesterol, low and high density lipoproteins, triglycerides and 25-hydoxy D₃. Linear regression models were used to assess the association of covariates with the mean concentrations of HbA_1C in quintiles and multivariate linear regression model was used to distinguish the impacts of dietary macronutrient composition of the diet.

Results

Carbohydrate and dietary fiber intakes were inversely (P: < 0.0001 and 0.003 respectively) and dietary amount and proportion of saturated, mono-unsaturated and poly-unsaturated fatty were positively (P: < 0.0001, 0.03, 0.01 and 0.01 respectively) associated with HbA_1C concentrations.

Multivariate linear regression macronutrient density model that controlled for age, sex, diabetes duration and calorie intake showed that carbohydrate was inversely associated with HbA_1C (P < 0.0001, R² = 15%). Results were also the same in the other three models adjusted for stress and exercise levels in model 2, waist circumference and sum of meals in model 3 and serum triglyceride and 25-hydroxy vitamin D in model 4(P < .0001, <.0001 and 0.0003 respectively). Calorie intake of 25 Kcal/body weight was identified as a cut of point of the negative effect of dietary carbohydrate and 30 for the positive effect of fat on HbA1c respectively (P = 0.04 and 0.03). Moreover, carbohydrate intake was positively (β = 0.08, P = 0.01) and protein (β = −0.04, P < 0.0001), SAFA (β = −0.04, P < 0.0001) and MUFA (β = −0.02, 0.07) proportion were negatively associated with increment in calorie intake.

Conclusion

This study showed that the substitution of fat for carbohydrate is associated with low concentrations of HbA1c in high calorie consuming type 2 diabetic patients.

【 授权许可】

   
2013 Shadman et al.; licensee BioMed Central Ltd.

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