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Personalized risk prediction for type 2 diabetes: the potential of genetic risk scores
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Journal Article
Personalized risk prediction for type 2 diabetes: the potential of genetic risk scores
2017
Overview
Using effect estimates from genome-wide association studies (GWAS), we identified a genetic risk score (GRS) that has the strongest association with type 2 diabetes (T2D) status in a population-based cohort and investigated its potential for prospective T2D risk assessment.
By varying the number of single-nucleotide polymorphisms (SNPs) and their respective weights, alternative versions of GRS can be computed. They were tested in 1,181 T2D cases and 9,092 controls of the Estonian Biobank cohort. The best-fitting GRS was chosen for the subsequent analysis of incident T2D (386 cases).
The best fit was provided by a novel doubly weighted GRS that captures the effect of 1,000 SNPs. The hazard for incident T2D was 3.45 times (95% CI: 2.31–5.17) higher in the highest GRS quintile compared with the lowest quintile, after adjusting for body mass index and other known predictors. Adding GRS to the prediction model for 5-year T2D risk resulted in continuous net reclassification improvement of 0.324 (95% CI: 0.211–0.444). In addition, a significant effect of the GRS on all-cause and cardiovascular mortality was observed.
The proposed GRS would improve the accuracy of T2D risk prediction when added to the currently used set of predictors.
Genet Med19 3, 322–329.
Publisher
Elsevier Inc,Nature Publishing Group US,Elsevier Limited,Nature Publishing Group
Subject
/ Alleles
/ Biomedical and Life Sciences
/ Diabetes Mellitus, Type 2 - genetics
/ Diabetes Mellitus, Type 2 - prevention & control
/ Diabetes Mellitus, Type 2 - therapy
/ Female
/ Genetic Predisposition to Disease
/ Genome-Wide Association Study
/ Genotype
/ Humans
/ Male
/ Original
/ Polymorphism, Single Nucleotide
