Researchers from Sun Yat-Sen University in China examined the longitudinal associations between changes in glycemic load (GL) and the incidence of diabetes among pre-diabetic patients. Their results were published in the journal Nutrition Research.
According to the researchers, only a few prospective studies that evaluated the association between GL and diabetes have accounted for changes in GL.
They believe that the diet of patients could be modified in response to an awareness of pre-diabetes.
They hypothesized that subjects with low and high baseline GL would show different correlations with diabetes.
For this study, they recruited a total of 493 pre-diabetic patients (142 men and 351 women) between 40 and 79 years of age.
They obtained dietary records and conducted oral glucose tolerance tests on the participants every year.
They divided the participants into low- and high-GL groups based on baseline GL.
During a median four years of follow-up, they identified 108 incident cases of diabetes.
Among participants with a high baseline GL, the incidence of diabetes increased with decreasing GL reduction, and the multivariate-adjusted HR (95 percent CI) was 2.34 (1.27--4.29) when comparing the lowest to the highest tertiles.
However, among those with a low baseline GL, the researchers observed no significant association.
Regardless of baseline GL status, the incidence of diabetes was higher in individuals with a high follow-up GL than in those with a low follow-up GL, and the multivariate-adjusted HR (95 percent CI) was 1.64 (1.09--2.45).
Based on these findings, the researchers concluded that GL reduction is associated with a lower diabetes risk in pre-diabetic patients with a high dietary GL, while in patients with pre-diabetes and a low dietary GL, further reductions in GL do not have any additional effects.
Journal Reference:
He FY, Chen CG, Lin DZ, Lin XH, Qi YQ, Yan L. A GREATER GLYCEMIC LOAD REDUCTION WAS ASSOCIATED WITH A LOWER DIABETES RISK IN PRE-DIABETIC PATIENTS WHO CONSUME A HIGH GLYCEMIC LOAD DIET. Nutrition Research. May 2018;53:77–84. DOI: 10.1016/j.nutres.2018.03.011