Systolic Blood Pressure and Risk of Type 2 Diabetes: A Mendelian Randomization Study.
- 2017
Available online from MWHC library: 1995 - present (after 3 months), Available in print through MWHC library: 1999 - 2006
Copyright � 2017 by the American Diabetes Association. Observational studies have shown that elevated systolic blood pressure (SBP) is associated with future onset of type 2 diabetes, but whether this association is causal is not known. We applied the Mendelian randomization framework to evaluate the causal hypothesis that elevated SBP increases risk for type 2 diabetes. We used 28 genetic variants associated with SBP and evaluated their impact on type 2 diabetes using a European-centric meta-analysis comprising 37,293 case and 125,686 control subjects. We found that elevation of SBP levels by 1 mmHg due to our genetic score was associated with a 2% increase in risk of type 2 diabetes (odds ratio 1.02, 95% CI 1.01-1.03, P = 9.05 x 10-5). To limit confounding, we constructed a second score based on 13 variants exclusively associated with SBP and found a similar increase in type 2 diabetes risk per 1 mmHg of genetic elevation in SBP (odds ratio 1.02, 95% CI 1.01-1.03, P = 1.48 x 10-3). Sensitivity analyses using multiple, alternative causal inference measures and simulation studies demonstrated consistent association, suggesting robustness of our primary observation. In line with previous reports from observational studies, we found that genetically elevated SBP was associated with increased risk for type 2 diabetes. Further work will be required to elucidate the biological mechanism and translational implications.
English
0012-1797
*Blood Pressure/ge [Genetics] *Diabetes Mellitus, Type 2/ge [Genetics] Case-Control Studies Causality Diabetes Mellitus, Type 2/ep [Epidemiology] European Continental Ancestry Group Genetic Variation Humans Mendelian Randomization Analysis Odds Ratio Polymorphism, Single Nucleotide Regression Analysis Risk Factors Systole